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Finding the Fourth Proportional to 480,645.90, 721,017.72 and 165,061.80

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Solution

The fourth proportional to 480,645.90, 721,017.72 and 165,061.80 is: 247,609.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,645.90 : 721,017.72 = 165,061.80 : x
  2. Step 2: Convert to fraction form
    480,645.90/721,017.72 = 165,061.80/x
  3. Step 3: Cross multiply
    480,645.90x = 721,017.72 × 165,061.80
  4. Step 4: Simplify right side
    480,645.90x = 119,012,482,695.10
  5. Step 5: Solve for x
    x = 119,012,482,695.10/480,645.90
  6. Step 6: Final answer
    x = 247,609.48

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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.