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Finding the Fourth Proportional to 1,155.88, 1,595.12 and 631.92

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Solution

The fourth proportional to 1,155.88, 1,595.12 and 631.92 is: 872.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.88 : 1,595.12 = 631.92 : x
  2. Step 2: Convert to fraction form
    1,155.88/1,595.12 = 631.92/x
  3. Step 3: Cross multiply
    1,155.88x = 1,595.12 × 631.92
  4. Step 4: Simplify right side
    1,155.88x = 1,007,988.23
  5. Step 5: Solve for x
    x = 1,007,988.23/1,155.88
  6. Step 6: Final answer
    x = 872.05

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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.