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Finding the Fourth Proportional to 720,665, 1,078,319.04 and 453,174.92

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Solution

The fourth proportional to 720,665, 1,078,319.04 and 453,174.92 is: 678,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,665 : 1,078,319.04 = 453,174.92 : x
  2. Step 2: Convert to fraction form
    720,665/1,078,319.04 = 453,174.92/x
  3. Step 3: Cross multiply
    720,665x = 1,078,319.04 × 453,174.92
  4. Step 4: Simplify right side
    720,665x = 488,667,144,686.48
  5. Step 5: Solve for x
    x = 488,667,144,686.48/720,665
  6. Step 6: Final answer
    x = 678,078.09

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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.