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Finding the Fourth Proportional to 438,005.20, 657,007.80 and 297,000.40

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Solution

The fourth proportional to 438,005.20, 657,007.80 and 297,000.40 is: 445,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,005.20 : 657,007.80 = 297,000.40 : x
  2. Step 2: Convert to fraction form
    438,005.20/657,007.80 = 297,000.40/x
  3. Step 3: Cross multiply
    438,005.20x = 657,007.80 × 297,000.40
  4. Step 4: Simplify right side
    438,005.20x = 195,131,579,403.12
  5. Step 5: Solve for x
    x = 195,131,579,403.12/438,005.20
  6. Step 6: Final answer
    x = 445,500.60

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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.