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Finding the Fourth Proportional to 420,937.36, 631,655.15 and 154,884.71

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Solution

The fourth proportional to 420,937.36, 631,655.15 and 154,884.71 is: 232,418.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,937.36 : 631,655.15 = 154,884.71 : x
  2. Step 2: Convert to fraction form
    420,937.36/631,655.15 = 154,884.71/x
  3. Step 3: Cross multiply
    420,937.36x = 631,655.15 × 154,884.71
  4. Step 4: Simplify right side
    420,937.36x = 97,833,722,632.83
  5. Step 5: Solve for x
    x = 97,833,722,632.83/420,937.36
  6. Step 6: Final answer
    x = 232,418.72

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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.