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Finding the Fourth Proportional to 421,279.81, 631,857.41 and 154,978.04

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Solution

The fourth proportional to 421,279.81, 631,857.41 and 154,978.04 is: 232,444.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,279.81 : 631,857.41 = 154,978.04 : x
  2. Step 2: Convert to fraction form
    421,279.81/631,857.41 = 154,978.04/x
  3. Step 3: Cross multiply
    421,279.81x = 631,857.41 × 154,978.04
  4. Step 4: Simplify right side
    421,279.81x = 97,924,019,027.10
  5. Step 5: Solve for x
    x = 97,924,019,027.10/421,279.81
  6. Step 6: Final answer
    x = 232,444.13

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.