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Finding the Fourth Proportional to 1,367.68, 1,886.80 and 870.14

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Solution

The fourth proportional to 1,367.68, 1,886.80 and 870.14 is: 1,200.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.68 : 1,886.80 = 870.14 : x
  2. Step 2: Convert to fraction form
    1,367.68/1,886.80 = 870.14/x
  3. Step 3: Cross multiply
    1,367.68x = 1,886.80 × 870.14
  4. Step 4: Simplify right side
    1,367.68x = 1,641,780.15
  5. Step 5: Solve for x
    x = 1,641,780.15/1,367.68
  6. Step 6: Final answer
    x = 1,200.41

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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.