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Finding the Fourth Proportional to 759,820.80, 1,139,731.20 and 724,828.80

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Solution

The fourth proportional to 759,820.80, 1,139,731.20 and 724,828.80 is: 1,087,243.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    759,820.80 : 1,139,731.20 = 724,828.80 : x
  2. Step 2: Convert to fraction form
    759,820.80/1,139,731.20 = 724,828.80/x
  3. Step 3: Cross multiply
    759,820.80x = 1,139,731.20 × 724,828.80
  4. Step 4: Simplify right side
    759,820.80x = 826,109,998,018.56
  5. Step 5: Solve for x
    x = 826,109,998,018.56/759,820.80
  6. Step 6: Final answer
    x = 1,087,243.20

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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.