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Finding the Fourth Proportional to 292,479.31, 438,719.10 and 105,490.81

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Solution

The fourth proportional to 292,479.31, 438,719.10 and 105,490.81 is: 158,236.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,479.31 : 438,719.10 = 105,490.81 : x
  2. Step 2: Convert to fraction form
    292,479.31/438,719.10 = 105,490.81/x
  3. Step 3: Cross multiply
    292,479.31x = 438,719.10 × 105,490.81
  4. Step 4: Simplify right side
    292,479.31x = 46,280,833,221.47
  5. Step 5: Solve for x
    x = 46,280,833,221.47/292,479.31
  6. Step 6: Final answer
    x = 158,236.26

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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.