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Finding the Fourth Proportional to 1,188.68, 1,640.50 and 746.92

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Solution

The fourth proportional to 1,188.68, 1,640.50 and 746.92 is: 1,030.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.68 : 1,640.50 = 746.92 : x
  2. Step 2: Convert to fraction form
    1,188.68/1,640.50 = 746.92/x
  3. Step 3: Cross multiply
    1,188.68x = 1,640.50 × 746.92
  4. Step 4: Simplify right side
    1,188.68x = 1,225,322.26
  5. Step 5: Solve for x
    x = 1,225,322.26/1,188.68
  6. Step 6: Final answer
    x = 1,030.83

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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.