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Finding the Fourth Proportional to 720,128.78, 1,080,871.14 and 365,397.38

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Solution

The fourth proportional to 720,128.78, 1,080,871.14 and 365,397.38 is: 548,440.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,128.78 : 1,080,871.14 = 365,397.38 : x
  2. Step 2: Convert to fraction form
    720,128.78/1,080,871.14 = 365,397.38/x
  3. Step 3: Cross multiply
    720,128.78x = 1,080,871.14 × 365,397.38
  4. Step 4: Simplify right side
    720,128.78x = 394,947,480,637.40
  5. Step 5: Solve for x
    x = 394,947,480,637.40/720,128.78
  6. Step 6: Final answer
    x = 548,440.07

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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.