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Finding the Fourth Proportional to 518,155.04, 715,043.18 and 288,711.41

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Solution

The fourth proportional to 518,155.04, 715,043.18 and 288,711.41 is: 398,415.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,155.04 : 715,043.18 = 288,711.41 : x
  2. Step 2: Convert to fraction form
    518,155.04/715,043.18 = 288,711.41/x
  3. Step 3: Cross multiply
    518,155.04x = 715,043.18 × 288,711.41
  4. Step 4: Simplify right side
    518,155.04x = 206,441,119,689.91
  5. Step 5: Solve for x
    x = 206,441,119,689.91/518,155.04
  6. Step 6: Final answer
    x = 398,415.74

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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.