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Finding the Fourth Proportional to 1,161.95, 1,603.49 and 630.82

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Solution

The fourth proportional to 1,161.95, 1,603.49 and 630.82 is: 870.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.95 : 1,603.49 = 630.82 : x
  2. Step 2: Convert to fraction form
    1,161.95/1,603.49 = 630.82/x
  3. Step 3: Cross multiply
    1,161.95x = 1,603.49 × 630.82
  4. Step 4: Simplify right side
    1,161.95x = 1,011,506.40
  5. Step 5: Solve for x
    x = 1,011,506.40/1,161.95
  6. Step 6: Final answer
    x = 870.53

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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.