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Finding the Fourth Proportional to 970.18, 1,338.81 and 577.38

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Solution

The fourth proportional to 970.18, 1,338.81 and 577.38 is: 796.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.18 : 1,338.81 = 577.38 : x
  2. Step 2: Convert to fraction form
    970.18/1,338.81 = 577.38/x
  3. Step 3: Cross multiply
    970.18x = 1,338.81 × 577.38
  4. Step 4: Simplify right side
    970.18x = 773,002.12
  5. Step 5: Solve for x
    x = 773,002.12/970.18
  6. Step 6: Final answer
    x = 796.76

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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.