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Finding the Fourth Proportional to 292,454.15, 438,710.13 and 121,640.81

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Solution

The fourth proportional to 292,454.15, 438,710.13 and 121,640.81 is: 182,473.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,454.15 : 438,710.13 = 121,640.81 : x
  2. Step 2: Convert to fraction form
    292,454.15/438,710.13 = 121,640.81/x
  3. Step 3: Cross multiply
    292,454.15x = 438,710.13 × 121,640.81
  4. Step 4: Simplify right side
    292,454.15x = 53,365,053,374.85
  5. Step 5: Solve for x
    x = 53,365,053,374.85/292,454.15
  6. Step 6: Final answer
    x = 182,473.23

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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.