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Finding the Fourth Proportional to 771,999.80, 1,157,999.70 and 211,034.30

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Solution

The fourth proportional to 771,999.80, 1,157,999.70 and 211,034.30 is: 316,551.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,999.80 : 1,157,999.70 = 211,034.30 : x
  2. Step 2: Convert to fraction form
    771,999.80/1,157,999.70 = 211,034.30/x
  3. Step 3: Cross multiply
    771,999.80x = 1,157,999.70 × 211,034.30
  4. Step 4: Simplify right side
    771,999.80x = 244,377,656,089.71
  5. Step 5: Solve for x
    x = 244,377,656,089.71/771,999.80
  6. Step 6: Final answer
    x = 316,551.45

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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.