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Finding the Fourth Proportional to 771,489.80, 1,157,234.70 and 210,524.30

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Solution

The fourth proportional to 771,489.80, 1,157,234.70 and 210,524.30 is: 315,786.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,489.80 : 1,157,234.70 = 210,524.30 : x
  2. Step 2: Convert to fraction form
    771,489.80/1,157,234.70 = 210,524.30/x
  3. Step 3: Cross multiply
    771,489.80x = 1,157,234.70 × 210,524.30
  4. Step 4: Simplify right side
    771,489.80x = 243,626,025,153.21
  5. Step 5: Solve for x
    x = 243,626,025,153.21/771,489.80
  6. Step 6: Final answer
    x = 315,786.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.