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Finding the Fourth Proportional to 280,031.63, 386,472.80 and 172,598.90

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Solution

The fourth proportional to 280,031.63, 386,472.80 and 172,598.90 is: 238,204.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,031.63 : 386,472.80 = 172,598.90 : x
  2. Step 2: Convert to fraction form
    280,031.63/386,472.80 = 172,598.90/x
  3. Step 3: Cross multiply
    280,031.63x = 386,472.80 × 172,598.90
  4. Step 4: Simplify right side
    280,031.63x = 66,704,778,659.05
  5. Step 5: Solve for x
    x = 66,704,778,659.05/280,031.63
  6. Step 6: Final answer
    x = 238,204.45

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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.