Home / 865,711.80-1,298,567.70-487,798.20

Finding the Fourth Proportional to 865,711.80, 1,298,567.70 and 487,798.20

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Solution

The fourth proportional to 865,711.80, 1,298,567.70 and 487,798.20 is: 731,697.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,711.80 : 1,298,567.70 = 487,798.20 : x
  2. Step 2: Convert to fraction form
    865,711.80/1,298,567.70 = 487,798.20/x
  3. Step 3: Cross multiply
    865,711.80x = 1,298,567.70 × 487,798.20
  4. Step 4: Simplify right side
    865,711.80x = 633,438,986,638.14
  5. Step 5: Solve for x
    x = 633,438,986,638.14/865,711.80
  6. Step 6: Final answer
    x = 731,697.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.