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Finding the Fourth Proportional to 1,252.30, 1,726.86 and 879.16

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Solution

The fourth proportional to 1,252.30, 1,726.86 and 879.16 is: 1,212.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.30 : 1,726.86 = 879.16 : x
  2. Step 2: Convert to fraction form
    1,252.30/1,726.86 = 879.16/x
  3. Step 3: Cross multiply
    1,252.30x = 1,726.86 × 879.16
  4. Step 4: Simplify right side
    1,252.30x = 1,518,186.24
  5. Step 5: Solve for x
    x = 1,518,186.24/1,252.30
  6. Step 6: Final answer
    x = 1,212.32

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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.