Home / 1,120.13-1,681.22-572.70

Finding the Fourth Proportional to 1,120.13, 1,681.22 and 572.70

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Solution

The fourth proportional to 1,120.13, 1,681.22 and 572.70 is: 859.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.13 : 1,681.22 = 572.70 : x
  2. Step 2: Convert to fraction form
    1,120.13/1,681.22 = 572.70/x
  3. Step 3: Cross multiply
    1,120.13x = 1,681.22 × 572.70
  4. Step 4: Simplify right side
    1,120.13x = 962,834.69
  5. Step 5: Solve for x
    x = 962,834.69/1,120.13
  6. Step 6: Final answer
    x = 859.57

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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.