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Finding the Fourth Proportional to 545,903.80, 818,855.70 and 457,330.30

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Solution

The fourth proportional to 545,903.80, 818,855.70 and 457,330.30 is: 685,995.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,903.80 : 818,855.70 = 457,330.30 : x
  2. Step 2: Convert to fraction form
    545,903.80/818,855.70 = 457,330.30/x
  3. Step 3: Cross multiply
    545,903.80x = 818,855.70 × 457,330.30
  4. Step 4: Simplify right side
    545,903.80x = 374,487,522,937.71
  5. Step 5: Solve for x
    x = 374,487,522,937.71/545,903.80
  6. Step 6: Final answer
    x = 685,995.45

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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.