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Finding the Fourth Proportional to 1,316.20, 1,975.68 and 797.47

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Solution

The fourth proportional to 1,316.20, 1,975.68 and 797.47 is: 1,197.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.20 : 1,975.68 = 797.47 : x
  2. Step 2: Convert to fraction form
    1,316.20/1,975.68 = 797.47/x
  3. Step 3: Cross multiply
    1,316.20x = 1,975.68 × 797.47
  4. Step 4: Simplify right side
    1,316.20x = 1,575,545.53
  5. Step 5: Solve for x
    x = 1,575,545.53/1,316.20
  6. Step 6: Final answer
    x = 1,197.04

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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.