Home / 1,312.86-1,959.69-1,157.18

Finding the Fourth Proportional to 1,312.86, 1,959.69 and 1,157.18

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Solution

The fourth proportional to 1,312.86, 1,959.69 and 1,157.18 is: 1,727.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.86 : 1,959.69 = 1,157.18 : x
  2. Step 2: Convert to fraction form
    1,312.86/1,959.69 = 1,157.18/x
  3. Step 3: Cross multiply
    1,312.86x = 1,959.69 × 1,157.18
  4. Step 4: Simplify right side
    1,312.86x = 2,267,702.11
  5. Step 5: Solve for x
    x = 2,267,702.11/1,312.86
  6. Step 6: Final answer
    x = 1,727.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.