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Finding the Fourth Proportional to 1,055.88, 1,458.21 and 807.18

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Solution

The fourth proportional to 1,055.88, 1,458.21 and 807.18 is: 1,114.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.88 : 1,458.21 = 807.18 : x
  2. Step 2: Convert to fraction form
    1,055.88/1,458.21 = 807.18/x
  3. Step 3: Cross multiply
    1,055.88x = 1,458.21 × 807.18
  4. Step 4: Simplify right side
    1,055.88x = 1,177,037.95
  5. Step 5: Solve for x
    x = 1,177,037.95/1,055.88
  6. Step 6: Final answer
    x = 1,114.75

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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.