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Finding the Fourth Proportional to 1,064.85, 1,595.75 and 992.58

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Solution

The fourth proportional to 1,064.85, 1,595.75 and 992.58 is: 1,487.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.85 : 1,595.75 = 992.58 : x
  2. Step 2: Convert to fraction form
    1,064.85/1,595.75 = 992.58/x
  3. Step 3: Cross multiply
    1,064.85x = 1,595.75 × 992.58
  4. Step 4: Simplify right side
    1,064.85x = 1,583,904.57
  5. Step 5: Solve for x
    x = 1,583,904.57/1,064.85
  6. Step 6: Final answer
    x = 1,487.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.