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Finding the Fourth Proportional to 280,272.54, 386,788.72 and 157,807.10

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Solution

The fourth proportional to 280,272.54, 386,788.72 and 157,807.10 is: 217,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,272.54 : 386,788.72 = 157,807.10 : x
  2. Step 2: Convert to fraction form
    280,272.54/386,788.72 = 157,807.10/x
  3. Step 3: Cross multiply
    280,272.54x = 386,788.72 × 157,807.10
  4. Step 4: Simplify right side
    280,272.54x = 61,038,006,215.91
  5. Step 5: Solve for x
    x = 61,038,006,215.91/280,272.54
  6. Step 6: Final answer
    x = 217,780.90

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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.