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Finding the Fourth Proportional to 405,638.28, 608,472.61 and 121,332.53

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Solution

The fourth proportional to 405,638.28, 608,472.61 and 121,332.53 is: 182,003.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,638.28 : 608,472.61 = 121,332.53 : x
  2. Step 2: Convert to fraction form
    405,638.28/608,472.61 = 121,332.53/x
  3. Step 3: Cross multiply
    405,638.28x = 608,472.61 × 121,332.53
  4. Step 4: Simplify right side
    405,638.28x = 73,827,522,424.85
  5. Step 5: Solve for x
    x = 73,827,522,424.85/405,638.28
  6. Step 6: Final answer
    x = 182,003.34

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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.