Home / 1,265.40-1,887.93-1,126.80

Finding the Fourth Proportional to 1,265.40, 1,887.93 and 1,126.80

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Solution

The fourth proportional to 1,265.40, 1,887.93 and 1,126.80 is: 1,681.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.40 : 1,887.93 = 1,126.80 : x
  2. Step 2: Convert to fraction form
    1,265.40/1,887.93 = 1,126.80/x
  3. Step 3: Cross multiply
    1,265.40x = 1,887.93 × 1,126.80
  4. Step 4: Simplify right side
    1,265.40x = 2,127,319.52
  5. Step 5: Solve for x
    x = 2,127,319.52/1,265.40
  6. Step 6: Final answer
    x = 1,681.14

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1.5x scale

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.