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Finding the Fourth Proportional to 970.26, 1,338.26 and 577.40

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Solution

The fourth proportional to 970.26, 1,338.26 and 577.40 is: 796.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.26 : 1,338.26 = 577.40 : x
  2. Step 2: Convert to fraction form
    970.26/1,338.26 = 577.40/x
  3. Step 3: Cross multiply
    970.26x = 1,338.26 × 577.40
  4. Step 4: Simplify right side
    970.26x = 772,711.32
  5. Step 5: Solve for x
    x = 772,711.32/970.26
  6. Step 6: Final answer
    x = 796.40

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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.