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Finding the Fourth Proportional to 1,155.07, 1,593.99 and 631.12

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Solution

The fourth proportional to 1,155.07, 1,593.99 and 631.12 is: 870.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.07 : 1,593.99 = 631.12 : x
  2. Step 2: Convert to fraction form
    1,155.07/1,593.99 = 631.12/x
  3. Step 3: Cross multiply
    1,155.07x = 1,593.99 × 631.12
  4. Step 4: Simplify right side
    1,155.07x = 1,005,998.97
  5. Step 5: Solve for x
    x = 1,005,998.97/1,155.07
  6. Step 6: Final answer
    x = 870.94

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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.