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Finding the Fourth Proportional to 390,049.68, 584,958.60 and 165,406.80

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Solution

The fourth proportional to 390,049.68, 584,958.60 and 165,406.80 is: 248,061.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,049.68 : 584,958.60 = 165,406.80 : x
  2. Step 2: Convert to fraction form
    390,049.68/584,958.60 = 165,406.80/x
  3. Step 3: Cross multiply
    390,049.68x = 584,958.60 × 165,406.80
  4. Step 4: Simplify right side
    390,049.68x = 96,756,130,158.48
  5. Step 5: Solve for x
    x = 96,756,130,158.48/390,049.68
  6. Step 6: Final answer
    x = 248,061.04

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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.