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Finding the Fourth Proportional to 516,493.90, 712,760.88 and 287,043.90

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Solution

The fourth proportional to 516,493.90, 712,760.88 and 287,043.90 is: 396,120.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,493.90 : 712,760.88 = 287,043.90 : x
  2. Step 2: Convert to fraction form
    516,493.90/712,760.88 = 287,043.90/x
  3. Step 3: Cross multiply
    516,493.90x = 712,760.88 × 287,043.90
  4. Step 4: Simplify right side
    516,493.90x = 204,593,662,762.63
  5. Step 5: Solve for x
    x = 204,593,662,762.63/516,493.90
  6. Step 6: Final answer
    x = 396,120.19

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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.