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Finding the Fourth Proportional to 280,478.32, 387,060.05 and 153,154.03

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Solution

The fourth proportional to 280,478.32, 387,060.05 and 153,154.03 is: 211,352.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,478.32 : 387,060.05 = 153,154.03 : x
  2. Step 2: Convert to fraction form
    280,478.32/387,060.05 = 153,154.03/x
  3. Step 3: Cross multiply
    280,478.32x = 387,060.05 × 153,154.03
  4. Step 4: Simplify right side
    280,478.32x = 59,279,805,743.73
  5. Step 5: Solve for x
    x = 59,279,805,743.73/280,478.32
  6. Step 6: Final answer
    x = 211,352.54

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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.