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Finding the Fourth Proportional to 948.90, 1,309.39 and 700.36

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Solution

The fourth proportional to 948.90, 1,309.39 and 700.36 is: 966.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.90 : 1,309.39 = 700.36 : x
  2. Step 2: Convert to fraction form
    948.90/1,309.39 = 700.36/x
  3. Step 3: Cross multiply
    948.90x = 1,309.39 × 700.36
  4. Step 4: Simplify right side
    948.90x = 917,044.38
  5. Step 5: Solve for x
    x = 917,044.38/948.90
  6. Step 6: Final answer
    x = 966.43

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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.