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Finding the Fourth Proportional to 1,161.30, 1,602.56 and 630.18

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Solution

The fourth proportional to 1,161.30, 1,602.56 and 630.18 is: 869.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.30 : 1,602.56 = 630.18 : x
  2. Step 2: Convert to fraction form
    1,161.30/1,602.56 = 630.18/x
  3. Step 3: Cross multiply
    1,161.30x = 1,602.56 × 630.18
  4. Step 4: Simplify right side
    1,161.30x = 1,009,901.26
  5. Step 5: Solve for x
    x = 1,009,901.26/1,161.30
  6. Step 6: Final answer
    x = 869.63

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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.