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Finding the Fourth Proportional to 1,313.60, 1,966.92 and 792.90

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Solution

The fourth proportional to 1,313.60, 1,966.92 and 792.90 is: 1,187.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.60 : 1,966.92 = 792.90 : x
  2. Step 2: Convert to fraction form
    1,313.60/1,966.92 = 792.90/x
  3. Step 3: Cross multiply
    1,313.60x = 1,966.92 × 792.90
  4. Step 4: Simplify right side
    1,313.60x = 1,559,567.89
  5. Step 5: Solve for x
    x = 1,559,567.89/1,313.60
  6. Step 6: Final answer
    x = 1,187.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.