Home / 1,390.34-2,086.45-741.53

Finding the Fourth Proportional to 1,390.34, 2,086.45 and 741.53

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Solution

The fourth proportional to 1,390.34, 2,086.45 and 741.53 is: 1,112.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.34 : 2,086.45 = 741.53 : x
  2. Step 2: Convert to fraction form
    1,390.34/2,086.45 = 741.53/x
  3. Step 3: Cross multiply
    1,390.34x = 2,086.45 × 741.53
  4. Step 4: Simplify right side
    1,390.34x = 1,547,154.84
  5. Step 5: Solve for x
    x = 1,547,154.84/1,390.34
  6. Step 6: Final answer
    x = 1,112.79

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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.