Home / 1,121.29-1,547.14-723.07

Finding the Fourth Proportional to 1,121.29, 1,547.14 and 723.07

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Solution

The fourth proportional to 1,121.29, 1,547.14 and 723.07 is: 997.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.29 : 1,547.14 = 723.07 : x
  2. Step 2: Convert to fraction form
    1,121.29/1,547.14 = 723.07/x
  3. Step 3: Cross multiply
    1,121.29x = 1,547.14 × 723.07
  4. Step 4: Simplify right side
    1,121.29x = 1,118,690.52
  5. Step 5: Solve for x
    x = 1,118,690.52/1,121.29
  6. Step 6: Final answer
    x = 997.68

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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.