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Finding the Fourth Proportional to 280,425.76, 387,031.98 and 178,344.80

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Solution

The fourth proportional to 280,425.76, 387,031.98 and 178,344.80 is: 246,144.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,425.76 : 387,031.98 = 178,344.80 : x
  2. Step 2: Convert to fraction form
    280,425.76/387,031.98 = 178,344.80/x
  3. Step 3: Cross multiply
    280,425.76x = 387,031.98 × 178,344.80
  4. Step 4: Simplify right side
    280,425.76x = 69,025,141,066.70
  5. Step 5: Solve for x
    x = 69,025,141,066.70/280,425.76
  6. Step 6: Final answer
    x = 246,144.08

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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.