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Finding the Fourth Proportional to 418,770.30, 628,155.45 and 399,087.30

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Solution

The fourth proportional to 418,770.30, 628,155.45 and 399,087.30 is: 598,630.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,770.30 : 628,155.45 = 399,087.30 : x
  2. Step 2: Convert to fraction form
    418,770.30/628,155.45 = 399,087.30/x
  3. Step 3: Cross multiply
    418,770.30x = 628,155.45 × 399,087.30
  4. Step 4: Simplify right side
    418,770.30x = 250,688,862,520.79
  5. Step 5: Solve for x
    x = 250,688,862,520.79/418,770.30
  6. Step 6: Final answer
    x = 598,630.95

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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.