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Finding the Fourth Proportional to 1,162.16, 1,603.78 and 638.19

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Solution

The fourth proportional to 1,162.16, 1,603.78 and 638.19 is: 880.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.16 : 1,603.78 = 638.19 : x
  2. Step 2: Convert to fraction form
    1,162.16/1,603.78 = 638.19/x
  3. Step 3: Cross multiply
    1,162.16x = 1,603.78 × 638.19
  4. Step 4: Simplify right side
    1,162.16x = 1,023,519.26
  5. Step 5: Solve for x
    x = 1,023,519.26/1,162.16
  6. Step 6: Final answer
    x = 880.70

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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.