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Finding the Fourth Proportional to 280,031.55, 386,472.70 and 172,598.82

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Solution

The fourth proportional to 280,031.55, 386,472.70 and 172,598.82 is: 238,204.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,031.55 : 386,472.70 = 172,598.82 : x
  2. Step 2: Convert to fraction form
    280,031.55/386,472.70 = 172,598.82/x
  3. Step 3: Cross multiply
    280,031.55x = 386,472.70 × 172,598.82
  4. Step 4: Simplify right side
    280,031.55x = 66,704,731,982.21
  5. Step 5: Solve for x
    x = 66,704,731,982.21/280,031.55
  6. Step 6: Final answer
    x = 238,204.35

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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.