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Finding the Fourth Proportional to 1,155.87, 1,595.07 and 631.94

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Solution

The fourth proportional to 1,155.87, 1,595.07 and 631.94 is: 872.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.87 : 1,595.07 = 631.94 : x
  2. Step 2: Convert to fraction form
    1,155.87/1,595.07 = 631.94/x
  3. Step 3: Cross multiply
    1,155.87x = 1,595.07 × 631.94
  4. Step 4: Simplify right side
    1,155.87x = 1,007,980.56
  5. Step 5: Solve for x
    x = 1,007,980.56/1,155.87
  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.