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Finding the Fourth Proportional to 1,366.88, 1,886.26 and 807.39

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Solution

The fourth proportional to 1,366.88, 1,886.26 and 807.39 is: 1,114.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.88 : 1,886.26 = 807.39 : x
  2. Step 2: Convert to fraction form
    1,366.88/1,886.26 = 807.39/x
  3. Step 3: Cross multiply
    1,366.88x = 1,886.26 × 807.39
  4. Step 4: Simplify right side
    1,366.88x = 1,522,947.46
  5. Step 5: Solve for x
    x = 1,522,947.46/1,366.88
  6. Step 6: Final answer
    x = 1,114.18

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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.