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Finding the Fourth Proportional to 672,757.18, 928,423.60 and 411,154.86

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Solution

The fourth proportional to 672,757.18, 928,423.60 and 411,154.86 is: 567,405.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,757.18 : 928,423.60 = 411,154.86 : x
  2. Step 2: Convert to fraction form
    672,757.18/928,423.60 = 411,154.86/x
  3. Step 3: Cross multiply
    672,757.18x = 928,423.60 × 411,154.86
  4. Step 4: Simplify right side
    672,757.18x = 381,725,875,278.70
  5. Step 5: Solve for x
    x = 381,725,875,278.70/672,757.18
  6. Step 6: Final answer
    x = 567,405.13

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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.