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Finding the Fourth Proportional to 280,765.57, 387,346.61 and 173,148.79

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Solution

The fourth proportional to 280,765.57, 387,346.61 and 173,148.79 is: 238,877.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,765.57 : 387,346.61 = 173,148.79 : x
  2. Step 2: Convert to fraction form
    280,765.57/387,346.61 = 173,148.79/x
  3. Step 3: Cross multiply
    280,765.57x = 387,346.61 × 173,148.79
  4. Step 4: Simplify right side
    280,765.57x = 67,068,594,029.62
  5. Step 5: Solve for x
    x = 67,068,594,029.62/280,765.57
  6. Step 6: Final answer
    x = 238,877.56

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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.