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Finding the Fourth Proportional to 1,155.29, 1,595.99 and 999.77

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Solution

The fourth proportional to 1,155.29, 1,595.99 and 999.77 is: 1,381.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.29 : 1,595.99 = 999.77 : x
  2. Step 2: Convert to fraction form
    1,155.29/1,595.99 = 999.77/x
  3. Step 3: Cross multiply
    1,155.29x = 1,595.99 × 999.77
  4. Step 4: Simplify right side
    1,155.29x = 1,595,622.92
  5. Step 5: Solve for x
    x = 1,595,622.92/1,155.29
  6. Step 6: Final answer
    x = 1,381.14

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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.