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Finding the Fourth Proportional to 712,714.20, 983,545.92 and 390,435.96

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Solution

The fourth proportional to 712,714.20, 983,545.92 and 390,435.96 is: 538,801.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,714.20 : 983,545.92 = 390,435.96 : x
  2. Step 2: Convert to fraction form
    712,714.20/983,545.92 = 390,435.96/x
  3. Step 3: Cross multiply
    712,714.20x = 983,545.92 × 390,435.96
  4. Step 4: Simplify right side
    712,714.20x = 384,011,695,479.28
  5. Step 5: Solve for x
    x = 384,011,695,479.28/712,714.20
  6. Step 6: Final answer
    x = 538,801.80

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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.