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Finding the Fourth Proportional to 513,756.68, 708,983.21 and 287,402.18

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Solution

The fourth proportional to 513,756.68, 708,983.21 and 287,402.18 is: 396,614.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,756.68 : 708,983.21 = 287,402.18 : x
  2. Step 2: Convert to fraction form
    513,756.68/708,983.21 = 287,402.18/x
  3. Step 3: Cross multiply
    513,756.68x = 708,983.21 × 287,402.18
  4. Step 4: Simplify right side
    513,756.68x = 203,763,315,155.47
  5. Step 5: Solve for x
    x = 203,763,315,155.47/513,756.68
  6. Step 6: Final answer
    x = 396,614.44

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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.