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Finding the Fourth Proportional to 830.68, 1,144.96 and 760.96

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Solution

The fourth proportional to 830.68, 1,144.96 and 760.96 is: 1,048.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.68 : 1,144.96 = 760.96 : x
  2. Step 2: Convert to fraction form
    830.68/1,144.96 = 760.96/x
  3. Step 3: Cross multiply
    830.68x = 1,144.96 × 760.96
  4. Step 4: Simplify right side
    830.68x = 871,268.76
  5. Step 5: Solve for x
    x = 871,268.76/830.68
  6. Step 6: Final answer
    x = 1,048.86

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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.