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Finding the Fourth Proportional to 710,660.80, 1,065,991.20 and 663,659.20

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Solution

The fourth proportional to 710,660.80, 1,065,991.20 and 663,659.20 is: 995,488.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,660.80 : 1,065,991.20 = 663,659.20 : x
  2. Step 2: Convert to fraction form
    710,660.80/1,065,991.20 = 663,659.20/x
  3. Step 3: Cross multiply
    710,660.80x = 1,065,991.20 × 663,659.20
  4. Step 4: Simplify right side
    710,660.80x = 707,454,866,999.04
  5. Step 5: Solve for x
    x = 707,454,866,999.04/710,660.80
  6. Step 6: Final answer
    x = 995,488.80

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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.