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Finding the Fourth Proportional to 1,110.47, 1,532.16 and 815.22

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Solution

The fourth proportional to 1,110.47, 1,532.16 and 815.22 is: 1,124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.47 : 1,532.16 = 815.22 : x
  2. Step 2: Convert to fraction form
    1,110.47/1,532.16 = 815.22/x
  3. Step 3: Cross multiply
    1,110.47x = 1,532.16 × 815.22
  4. Step 4: Simplify right side
    1,110.47x = 1,249,047.48
  5. Step 5: Solve for x
    x = 1,249,047.48/1,110.47
  6. Step 6: Final answer
    x = 1,124.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.