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Finding the Fourth Proportional to 1,318.72, 1,820.51 and 964.24

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Solution

The fourth proportional to 1,318.72, 1,820.51 and 964.24 is: 1,331.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.72 : 1,820.51 = 964.24 : x
  2. Step 2: Convert to fraction form
    1,318.72/1,820.51 = 964.24/x
  3. Step 3: Cross multiply
    1,318.72x = 1,820.51 × 964.24
  4. Step 4: Simplify right side
    1,318.72x = 1,755,408.56
  5. Step 5: Solve for x
    x = 1,755,408.56/1,318.72
  6. Step 6: Final answer
    x = 1,331.15

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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.