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Finding the Fourth Proportional to 1,155.30, 1,595.08 and 713.86

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Solution

The fourth proportional to 1,155.30, 1,595.08 and 713.86 is: 985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.30 : 1,595.08 = 713.86 : x
  2. Step 2: Convert to fraction form
    1,155.30/1,595.08 = 713.86/x
  3. Step 3: Cross multiply
    1,155.30x = 1,595.08 × 713.86
  4. Step 4: Simplify right side
    1,155.30x = 1,138,663.81
  5. Step 5: Solve for x
    x = 1,138,663.81/1,155.30
  6. Step 6: Final answer
    x = 985.60

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1.5x scale

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.