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Finding the Fourth Proportional to 970.33, 1,338.85 and 577.13

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Solution

The fourth proportional to 970.33, 1,338.85 and 577.13 is: 796.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.33 : 1,338.85 = 577.13 : x
  2. Step 2: Convert to fraction form
    970.33/1,338.85 = 577.13/x
  3. Step 3: Cross multiply
    970.33x = 1,338.85 × 577.13
  4. Step 4: Simplify right side
    970.33x = 772,686.15
  5. Step 5: Solve for x
    x = 772,686.15/970.33
  6. Step 6: Final answer
    x = 796.31

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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.