Home / 1,560.24-2,153.20-861.68

Finding the Fourth Proportional to 1,560.24, 2,153.20 and 861.68

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Solution

The fourth proportional to 1,560.24, 2,153.20 and 861.68 is: 1,189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.24 : 2,153.20 = 861.68 : x
  2. Step 2: Convert to fraction form
    1,560.24/2,153.20 = 861.68/x
  3. Step 3: Cross multiply
    1,560.24x = 2,153.20 × 861.68
  4. Step 4: Simplify right side
    1,560.24x = 1,855,369.38
  5. Step 5: Solve for x
    x = 1,855,369.38/1,560.24
  6. Step 6: Final answer
    x = 1,189.16

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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.