Home / 865,704.30-1,298,556.45-487,790.70

Finding the Fourth Proportional to 865,704.30, 1,298,556.45 and 487,790.70

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Solution

The fourth proportional to 865,704.30, 1,298,556.45 and 487,790.70 is: 731,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,704.30 : 1,298,556.45 = 487,790.70 : x
  2. Step 2: Convert to fraction form
    865,704.30/1,298,556.45 = 487,790.70/x
  3. Step 3: Cross multiply
    865,704.30x = 1,298,556.45 × 487,790.70
  4. Step 4: Simplify right side
    865,704.30x = 633,423,759,735.02
  5. Step 5: Solve for x
    x = 633,423,759,735.02/865,704.30
  6. Step 6: Final answer
    x = 731,686.05

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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.