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Finding the Fourth Proportional to 421,332.32, 631,999.12 and 168,726.56

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Solution

The fourth proportional to 421,332.32, 631,999.12 and 168,726.56 is: 253,090.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,332.32 : 631,999.12 = 168,726.56 : x
  2. Step 2: Convert to fraction form
    421,332.32/631,999.12 = 168,726.56/x
  3. Step 3: Cross multiply
    421,332.32x = 631,999.12 × 168,726.56
  4. Step 4: Simplify right side
    421,332.32x = 106,635,037,440.63
  5. Step 5: Solve for x
    x = 106,635,037,440.63/421,332.32
  6. Step 6: Final answer
    x = 253,090.10

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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.