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Finding the Fourth Proportional to 672,881.96, 928,721.19 and 386,559.92

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Solution

The fourth proportional to 672,881.96, 928,721.19 and 386,559.92 is: 533,535.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,881.96 : 928,721.19 = 386,559.92 : x
  2. Step 2: Convert to fraction form
    672,881.96/928,721.19 = 386,559.92/x
  3. Step 3: Cross multiply
    672,881.96x = 928,721.19 × 386,559.92
  4. Step 4: Simplify right side
    672,881.96x = 359,006,384,265.10
  5. Step 5: Solve for x
    x = 359,006,384,265.10/672,881.96
  6. Step 6: Final answer
    x = 533,535.46

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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.