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Finding the Fourth Proportional to 620,404.70, 930,607.05 and 407,828.30

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Solution

The fourth proportional to 620,404.70, 930,607.05 and 407,828.30 is: 611,742.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,404.70 : 930,607.05 = 407,828.30 : x
  2. Step 2: Convert to fraction form
    620,404.70/930,607.05 = 407,828.30/x
  3. Step 3: Cross multiply
    620,404.70x = 930,607.05 × 407,828.30
  4. Step 4: Simplify right side
    620,404.70x = 379,527,891,169.52
  5. Step 5: Solve for x
    x = 379,527,891,169.52/620,404.70
  6. Step 6: Final answer
    x = 611,742.45

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Similar ratio
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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.