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Finding the Fourth Proportional to 970.39, 1,339.15 and 577.34

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Solution

The fourth proportional to 970.39, 1,339.15 and 577.34 is: 796.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.39 : 1,339.15 = 577.34 : x
  2. Step 2: Convert to fraction form
    970.39/1,339.15 = 577.34/x
  3. Step 3: Cross multiply
    970.39x = 1,339.15 × 577.34
  4. Step 4: Simplify right side
    970.39x = 773,139.06
  5. Step 5: Solve for x
    x = 773,139.06/970.39
  6. Step 6: Final answer
    x = 796.73

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Double scale
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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.