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Finding the Fourth Proportional to 372,132.40, 521,685.20 and 372,132.40

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Solution

The fourth proportional to 372,132.40, 521,685.20 and 372,132.40 is: 521,685.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,132.40 : 521,685.20 = 372,132.40 : x
  2. Step 2: Convert to fraction form
    372,132.40/521,685.20 = 372,132.40/x
  3. Step 3: Cross multiply
    372,132.40x = 521,685.20 × 372,132.40
  4. Step 4: Simplify right side
    372,132.40x = 194,135,965,520.48
  5. Step 5: Solve for x
    x = 194,135,965,520.48/372,132.40
  6. Step 6: Final answer
    x = 521,685.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.