Home / 1,292.55-1,782.92-1,127.16

Finding the Fourth Proportional to 1,292.55, 1,782.92 and 1,127.16

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Solution

The fourth proportional to 1,292.55, 1,782.92 and 1,127.16 is: 1,554.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.55 : 1,782.92 = 1,127.16 : x
  2. Step 2: Convert to fraction form
    1,292.55/1,782.92 = 1,127.16/x
  3. Step 3: Cross multiply
    1,292.55x = 1,782.92 × 1,127.16
  4. Step 4: Simplify right side
    1,292.55x = 2,009,643.38
  5. Step 5: Solve for x
    x = 2,009,643.38/1,292.55
  6. Step 6: Final answer
    x = 1,554.79

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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.