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Finding the Fourth Proportional to 719,616.68, 993,045.30 and 397,320.20

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Solution

The fourth proportional to 719,616.68, 993,045.30 and 397,320.20 is: 548,287.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,616.68 : 993,045.30 = 397,320.20 : x
  2. Step 2: Convert to fraction form
    719,616.68/993,045.30 = 397,320.20/x
  3. Step 3: Cross multiply
    719,616.68x = 993,045.30 × 397,320.20
  4. Step 4: Simplify right side
    719,616.68x = 394,556,957,205.06
  5. Step 5: Solve for x
    x = 394,556,957,205.06/719,616.68
  6. Step 6: Final answer
    x = 548,287.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.