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Finding the Fourth Proportional to 948.87, 1,309.41 and 534.87

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Solution

The fourth proportional to 948.87, 1,309.41 and 534.87 is: 738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.87 : 1,309.41 = 534.87 : x
  2. Step 2: Convert to fraction form
    948.87/1,309.41 = 534.87/x
  3. Step 3: Cross multiply
    948.87x = 1,309.41 × 534.87
  4. Step 4: Simplify right side
    948.87x = 700,364.13
  5. Step 5: Solve for x
    x = 700,364.13/948.87
  6. Step 6: Final answer
    x = 738.10

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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.