Home / 1,119.17-1,678.75-297.40

Finding the Fourth Proportional to 1,119.17, 1,678.75 and 297.40

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Solution

The fourth proportional to 1,119.17, 1,678.75 and 297.40 is: 446.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.17 : 1,678.75 = 297.40 : x
  2. Step 2: Convert to fraction form
    1,119.17/1,678.75 = 297.40/x
  3. Step 3: Cross multiply
    1,119.17x = 1,678.75 × 297.40
  4. Step 4: Simplify right side
    1,119.17x = 499,254.57
  5. Step 5: Solve for x
    x = 499,254.57/1,119.17
  6. Step 6: Final answer
    x = 446.09

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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.