Home / 1,036.20-1,428.92-918.22

Finding the Fourth Proportional to 1,036.20, 1,428.92 and 918.22

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Solution

The fourth proportional to 1,036.20, 1,428.92 and 918.22 is: 1,266.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.20 : 1,428.92 = 918.22 : x
  2. Step 2: Convert to fraction form
    1,036.20/1,428.92 = 918.22/x
  3. Step 3: Cross multiply
    1,036.20x = 1,428.92 × 918.22
  4. Step 4: Simplify right side
    1,036.20x = 1,312,062.92
  5. Step 5: Solve for x
    x = 1,312,062.92/1,036.20
  6. Step 6: Final answer
    x = 1,266.23

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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.