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Finding the Fourth Proportional to 434,326.70, 651,490.05 and 418,580.30

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Solution

The fourth proportional to 434,326.70, 651,490.05 and 418,580.30 is: 627,870.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,326.70 : 651,490.05 = 418,580.30 : x
  2. Step 2: Convert to fraction form
    434,326.70/651,490.05 = 418,580.30/x
  3. Step 3: Cross multiply
    434,326.70x = 651,490.05 × 418,580.30
  4. Step 4: Simplify right side
    434,326.70x = 272,700,900,576.02
  5. Step 5: Solve for x
    x = 272,700,900,576.02/434,326.70
  6. Step 6: Final answer
    x = 627,870.45

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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.