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Finding the Fourth Proportional to 515,854.12, 711,900.92 and 286,411.42

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Solution

The fourth proportional to 515,854.12, 711,900.92 and 286,411.42 is: 395,260.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,854.12 : 711,900.92 = 286,411.42 : x
  2. Step 2: Convert to fraction form
    515,854.12/711,900.92 = 286,411.42/x
  3. Step 3: Cross multiply
    515,854.12x = 711,900.92 × 286,411.42
  4. Step 4: Simplify right side
    515,854.12x = 203,896,549,386.90
  5. Step 5: Solve for x
    x = 203,896,549,386.90/515,854.12
  6. Step 6: Final answer
    x = 395,260.10

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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.