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Finding the Fourth Proportional to 1,014.85, 1,399.53 and 699.61

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Solution

The fourth proportional to 1,014.85, 1,399.53 and 699.61 is: 964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.85 : 1,399.53 = 699.61 : x
  2. Step 2: Convert to fraction form
    1,014.85/1,399.53 = 699.61/x
  3. Step 3: Cross multiply
    1,014.85x = 1,399.53 × 699.61
  4. Step 4: Simplify right side
    1,014.85x = 979,125.18
  5. Step 5: Solve for x
    x = 979,125.18/1,014.85
  6. Step 6: Final answer
    x = 964.80

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1.5x scale

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.