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Finding the Fourth Proportional to 438,191.40, 657,287.10 and 217,007.40

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Solution

The fourth proportional to 438,191.40, 657,287.10 and 217,007.40 is: 325,511.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,191.40 : 657,287.10 = 217,007.40 : x
  2. Step 2: Convert to fraction form
    438,191.40/657,287.10 = 217,007.40/x
  3. Step 3: Cross multiply
    438,191.40x = 657,287.10 × 217,007.40
  4. Step 4: Simplify right side
    438,191.40x = 142,636,164,624.54
  5. Step 5: Solve for x
    x = 142,636,164,624.54/438,191.40
  6. Step 6: Final answer
    x = 325,511.10

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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.