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Finding the Fourth Proportional to 672,572.90, 928,104.08 and 378,266.69

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Solution

The fourth proportional to 672,572.90, 928,104.08 and 378,266.69 is: 521,981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,572.90 : 928,104.08 = 378,266.69 : x
  2. Step 2: Convert to fraction form
    672,572.90/928,104.08 = 378,266.69/x
  3. Step 3: Cross multiply
    672,572.90x = 928,104.08 × 378,266.69
  4. Step 4: Simplify right side
    672,572.90x = 351,070,851,785.24
  5. Step 5: Solve for x
    x = 351,070,851,785.24/672,572.90
  6. Step 6: Final answer
    x = 521,981.86

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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.