Home / 516,720.82-712,988.54-287,271.70

Finding the Fourth Proportional to 516,720.82, 712,988.54 and 287,271.70

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Solution

The fourth proportional to 516,720.82, 712,988.54 and 287,271.70 is: 396,387.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,720.82 : 712,988.54 = 287,271.70 : x
  2. Step 2: Convert to fraction form
    516,720.82/712,988.54 = 287,271.70/x
  3. Step 3: Cross multiply
    516,720.82x = 712,988.54 × 287,271.70
  4. Step 4: Simplify right side
    516,720.82x = 204,821,429,966.32
  5. Step 5: Solve for x
    x = 204,821,429,966.32/516,720.82
  6. Step 6: Final answer
    x = 396,387.03

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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.