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Finding the Fourth Proportional to 1,121.04, 1,547.46 and 963.04

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Solution

The fourth proportional to 1,121.04, 1,547.46 and 963.04 is: 1,329.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.04 : 1,547.46 = 963.04 : x
  2. Step 2: Convert to fraction form
    1,121.04/1,547.46 = 963.04/x
  3. Step 3: Cross multiply
    1,121.04x = 1,547.46 × 963.04
  4. Step 4: Simplify right side
    1,121.04x = 1,490,270.71
  5. Step 5: Solve for x
    x = 1,490,270.71/1,121.04
  6. Step 6: Final answer
    x = 1,329.36

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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.