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Finding the Fourth Proportional to 630,178.56, 869,490.86 and 372,061.53

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Solution

The fourth proportional to 630,178.56, 869,490.86 and 372,061.53 is: 513,353.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,178.56 : 869,490.86 = 372,061.53 : x
  2. Step 2: Convert to fraction form
    630,178.56/869,490.86 = 372,061.53/x
  3. Step 3: Cross multiply
    630,178.56x = 869,490.86 × 372,061.53
  4. Step 4: Simplify right side
    630,178.56x = 323,504,097,832.31
  5. Step 5: Solve for x
    x = 323,504,097,832.31/630,178.56
  6. Step 6: Final answer
    x = 513,353.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.