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Finding the Fourth Proportional to 970.13, 1,338.84 and 577.55

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Solution

The fourth proportional to 970.13, 1,338.84 and 577.55 is: 797.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.13 : 1,338.84 = 577.55 : x
  2. Step 2: Convert to fraction form
    970.13/1,338.84 = 577.55/x
  3. Step 3: Cross multiply
    970.13x = 1,338.84 × 577.55
  4. Step 4: Simplify right side
    970.13x = 773,240.35
  5. Step 5: Solve for x
    x = 773,240.35/970.13
  6. Step 6: Final answer
    x = 797.05

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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.