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Finding the Fourth Proportional to 1,125.03, 1,552.71 and 653

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Solution

The fourth proportional to 1,125.03, 1,552.71 and 653 is: 901.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.03 : 1,552.71 = 653 : x
  2. Step 2: Convert to fraction form
    1,125.03/1,552.71 = 653/x
  3. Step 3: Cross multiply
    1,125.03x = 1,552.71 × 653
  4. Step 4: Simplify right side
    1,125.03x = 1,013,919.63
  5. Step 5: Solve for x
    x = 1,013,919.63/1,125.03
  6. Step 6: Final answer
    x = 901.24

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Double scale
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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.