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Finding the Fourth Proportional to 1,059.62, 1,461.54 and 728.84

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Solution

The fourth proportional to 1,059.62, 1,461.54 and 728.84 is: 1,005.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.62 : 1,461.54 = 728.84 : x
  2. Step 2: Convert to fraction form
    1,059.62/1,461.54 = 728.84/x
  3. Step 3: Cross multiply
    1,059.62x = 1,461.54 × 728.84
  4. Step 4: Simplify right side
    1,059.62x = 1,065,232.47
  5. Step 5: Solve for x
    x = 1,065,232.47/1,059.62
  6. Step 6: Final answer
    x = 1,005.29

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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.