Home / 1,079,875.20-1,619,812.80-781,276.80

Finding the Fourth Proportional to 1,079,875.20, 1,619,812.80 and 781,276.80

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Solution

The fourth proportional to 1,079,875.20, 1,619,812.80 and 781,276.80 is: 1,171,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079,875.20 : 1,619,812.80 = 781,276.80 : x
  2. Step 2: Convert to fraction form
    1,079,875.20/1,619,812.80 = 781,276.80/x
  3. Step 3: Cross multiply
    1,079,875.20x = 1,619,812.80 × 781,276.80
  4. Step 4: Simplify right side
    1,079,875.20x = 1,265,522,160,983.04
  5. Step 5: Solve for x
    x = 1,265,522,160,983.04/1,079,875.20
  6. Step 6: Final answer
    x = 1,171,915.20

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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.