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Finding the Fourth Proportional to 1,014.70, 1,391.55 and 972.62

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Solution

The fourth proportional to 1,014.70, 1,391.55 and 972.62 is: 1,333.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.70 : 1,391.55 = 972.62 : x
  2. Step 2: Convert to fraction form
    1,014.70/1,391.55 = 972.62/x
  3. Step 3: Cross multiply
    1,014.70x = 1,391.55 × 972.62
  4. Step 4: Simplify right side
    1,014.70x = 1,353,449.36
  5. Step 5: Solve for x
    x = 1,353,449.36/1,014.70
  6. Step 6: Final answer
    x = 1,333.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.