Home / 1,126.51-1,689.36-433.39

Finding the Fourth Proportional to 1,126.51, 1,689.36 and 433.39

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Solution

The fourth proportional to 1,126.51, 1,689.36 and 433.39 is: 649.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.51 : 1,689.36 = 433.39 : x
  2. Step 2: Convert to fraction form
    1,126.51/1,689.36 = 433.39/x
  3. Step 3: Cross multiply
    1,126.51x = 1,689.36 × 433.39
  4. Step 4: Simplify right side
    1,126.51x = 732,151.73
  5. Step 5: Solve for x
    x = 732,151.73/1,126.51
  6. Step 6: Final answer
    x = 649.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.