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Finding the Fourth Proportional to 420,548.76, 630,448.02 and 154,247.16

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Solution

The fourth proportional to 420,548.76, 630,448.02 and 154,247.16 is: 231,233.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,548.76 : 630,448.02 = 154,247.16 : x
  2. Step 2: Convert to fraction form
    420,548.76/630,448.02 = 154,247.16/x
  3. Step 3: Cross multiply
    420,548.76x = 630,448.02 × 154,247.16
  4. Step 4: Simplify right side
    420,548.76x = 97,244,816,612.62
  5. Step 5: Solve for x
    x = 97,244,816,612.62/420,548.76
  6. Step 6: Final answer
    x = 231,233.16

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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.