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Finding the Fourth Proportional to 280,425.14, 386,984.72 and 153,100.73

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Solution

The fourth proportional to 280,425.14, 386,984.72 and 153,100.73 is: 211,277.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,425.14 : 386,984.72 = 153,100.73 : x
  2. Step 2: Convert to fraction form
    280,425.14/386,984.72 = 153,100.73/x
  3. Step 3: Cross multiply
    280,425.14x = 386,984.72 × 153,100.73
  4. Step 4: Simplify right side
    280,425.14x = 59,247,640,430.42
  5. Step 5: Solve for x
    x = 59,247,640,430.42/280,425.14
  6. Step 6: Final answer
    x = 211,277.92

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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.