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Finding the Fourth Proportional to 421,672.08, 632,592.78 and 155,433.96

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Solution

The fourth proportional to 421,672.08, 632,592.78 and 155,433.96 is: 233,182.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,672.08 : 632,592.78 = 155,433.96 : x
  2. Step 2: Convert to fraction form
    421,672.08/632,592.78 = 155,433.96/x
  3. Step 3: Cross multiply
    421,672.08x = 632,592.78 × 155,433.96
  4. Step 4: Simplify right side
    421,672.08x = 98,326,400,862.81
  5. Step 5: Solve for x
    x = 98,326,400,862.81/421,672.08
  6. Step 6: Final answer
    x = 233,182.15

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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.