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Finding the Fourth Proportional to 312,603.12, 431,391.60 and 169,367.04

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Solution

The fourth proportional to 312,603.12, 431,391.60 and 169,367.04 is: 233,726.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,603.12 : 431,391.60 = 169,367.04 : x
  2. Step 2: Convert to fraction form
    312,603.12/431,391.60 = 169,367.04/x
  3. Step 3: Cross multiply
    312,603.12x = 431,391.60 × 169,367.04
  4. Step 4: Simplify right side
    312,603.12x = 73,063,518,372.86
  5. Step 5: Solve for x
    x = 73,063,518,372.86/312,603.12
  6. Step 6: Final answer
    x = 233,726.13

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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.