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Finding the Fourth Proportional to 280,675.71, 387,327.96 and 153,348.57

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Solution

The fourth proportional to 280,675.71, 387,327.96 and 153,348.57 is: 211,618.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,675.71 : 387,327.96 = 153,348.57 : x
  2. Step 2: Convert to fraction form
    280,675.71/387,327.96 = 153,348.57/x
  3. Step 3: Cross multiply
    280,675.71x = 387,327.96 × 153,348.57
  4. Step 4: Simplify right side
    280,675.71x = 59,396,188,787.02
  5. Step 5: Solve for x
    x = 59,396,188,787.02/280,675.71
  6. Step 6: Final answer
    x = 211,618.56

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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.