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Finding the Fourth Proportional to 405,446.19, 608,255.15 and 121,158.87

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Solution

The fourth proportional to 405,446.19, 608,255.15 and 121,158.87 is: 181,763.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,446.19 : 608,255.15 = 121,158.87 : x
  2. Step 2: Convert to fraction form
    405,446.19/608,255.15 = 121,158.87/x
  3. Step 3: Cross multiply
    405,446.19x = 608,255.15 × 121,158.87
  4. Step 4: Simplify right side
    405,446.19x = 73,695,506,039.89
  5. Step 5: Solve for x
    x = 73,695,506,039.89/405,446.19
  6. Step 6: Final answer
    x = 181,763.96

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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.