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Finding the Fourth Proportional to 719,745.80, 1,079,618.70 and 709,248.20

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Solution

The fourth proportional to 719,745.80, 1,079,618.70 and 709,248.20 is: 1,063,872.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,745.80 : 1,079,618.70 = 709,248.20 : x
  2. Step 2: Convert to fraction form
    719,745.80/1,079,618.70 = 709,248.20/x
  3. Step 3: Cross multiply
    719,745.80x = 1,079,618.70 × 709,248.20
  4. Step 4: Simplify right side
    719,745.80x = 765,717,619,661.34
  5. Step 5: Solve for x
    x = 765,717,619,661.34/719,745.80
  6. Step 6: Final answer
    x = 1,063,872.30

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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.