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Finding the Fourth Proportional to 421,280.06, 631,857.78 and 154,978.29

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Solution

The fourth proportional to 421,280.06, 631,857.78 and 154,978.29 is: 232,444.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,280.06 : 631,857.78 = 154,978.29 : x
  2. Step 2: Convert to fraction form
    421,280.06/631,857.78 = 154,978.29/x
  3. Step 3: Cross multiply
    421,280.06x = 631,857.78 × 154,978.29
  4. Step 4: Simplify right side
    421,280.06x = 97,924,235,108.31
  5. Step 5: Solve for x
    x = 97,924,235,108.31/421,280.06
  6. Step 6: Final answer
    x = 232,444.51

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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.