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Finding the Fourth Proportional to 390,421.52, 585,744.36 and 162,672.80

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Solution

The fourth proportional to 390,421.52, 585,744.36 and 162,672.80 is: 244,055.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,421.52 : 585,744.36 = 162,672.80 : x
  2. Step 2: Convert to fraction form
    390,421.52/585,744.36 = 162,672.80/x
  3. Step 3: Cross multiply
    390,421.52x = 585,744.36 × 162,672.80
  4. Step 4: Simplify right side
    390,421.52x = 95,284,675,125.41
  5. Step 5: Solve for x
    x = 95,284,675,125.41/390,421.52
  6. Step 6: Final answer
    x = 244,055.90

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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.