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Finding the Fourth Proportional to 424,728.77, 637,314.35 and 172,195.88

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Solution

The fourth proportional to 424,728.77, 637,314.35 and 172,195.88 is: 258,383.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,728.77 : 637,314.35 = 172,195.88 : x
  2. Step 2: Convert to fraction form
    424,728.77/637,314.35 = 172,195.88/x
  3. Step 3: Cross multiply
    424,728.77x = 637,314.35 × 172,195.88
  4. Step 4: Simplify right side
    424,728.77x = 109,742,901,287.33
  5. Step 5: Solve for x
    x = 109,742,901,287.33/424,728.77
  6. Step 6: Final answer
    x = 258,383.49

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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.