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Finding the Fourth Proportional to 438,743.40, 658,115.10 and 438,743.40

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Solution

The fourth proportional to 438,743.40, 658,115.10 and 438,743.40 is: 658,115.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,743.40 : 658,115.10 = 438,743.40 : x
  2. Step 2: Convert to fraction form
    438,743.40/658,115.10 = 438,743.40/x
  3. Step 3: Cross multiply
    438,743.40x = 658,115.10 × 438,743.40
  4. Step 4: Simplify right side
    438,743.40x = 288,743,656,565.34
  5. Step 5: Solve for x
    x = 288,743,656,565.34/438,743.40
  6. Step 6: Final answer
    x = 658,115.10

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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.