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Finding the Fourth Proportional to 391,728, 537,064.04 and 384,642.12

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Solution

The fourth proportional to 391,728, 537,064.04 and 384,642.12 is: 527,349.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,728 : 537,064.04 = 384,642.12 : x
  2. Step 2: Convert to fraction form
    391,728/537,064.04 = 384,642.12/x
  3. Step 3: Cross multiply
    391,728x = 537,064.04 × 384,642.12
  4. Step 4: Simplify right side
    391,728x = 206,577,448,998.15
  5. Step 5: Solve for x
    x = 206,577,448,998.15/391,728
  6. Step 6: Final answer
    x = 527,349.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.