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Finding the Fourth Proportional to 1,064.79, 1,469.61 and 671.54

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Solution

The fourth proportional to 1,064.79, 1,469.61 and 671.54 is: 926.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.79 : 1,469.61 = 671.54 : x
  2. Step 2: Convert to fraction form
    1,064.79/1,469.61 = 671.54/x
  3. Step 3: Cross multiply
    1,064.79x = 1,469.61 × 671.54
  4. Step 4: Simplify right side
    1,064.79x = 986,894.55
  5. Step 5: Solve for x
    x = 986,894.55/1,064.79
  6. Step 6: Final answer
    x = 926.84

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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.