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Finding the Fourth Proportional to 280,781.52, 387,476.28 and 158,262.72

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Solution

The fourth proportional to 280,781.52, 387,476.28 and 158,262.72 is: 218,401.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,781.52 : 387,476.28 = 158,262.72 : x
  2. Step 2: Convert to fraction form
    280,781.52/387,476.28 = 158,262.72/x
  3. Step 3: Cross multiply
    280,781.52x = 387,476.28 × 158,262.72
  4. Step 4: Simplify right side
    280,781.52x = 61,323,050,008.28
  5. Step 5: Solve for x
    x = 61,323,050,008.28/280,781.52
  6. Step 6: Final answer
    x = 218,401.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.