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Finding the Fourth Proportional to 1,029.19, 1,419.77 and 697.72

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Solution

The fourth proportional to 1,029.19, 1,419.77 and 697.72 is: 962.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.19 : 1,419.77 = 697.72 : x
  2. Step 2: Convert to fraction form
    1,029.19/1,419.77 = 697.72/x
  3. Step 3: Cross multiply
    1,029.19x = 1,419.77 × 697.72
  4. Step 4: Simplify right side
    1,029.19x = 990,600.12
  5. Step 5: Solve for x
    x = 990,600.12/1,029.19
  6. Step 6: Final answer
    x = 962.51

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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.