Home / 1,398.56-1,931.97-1,324.74

Finding the Fourth Proportional to 1,398.56, 1,931.97 and 1,324.74

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Solution

The fourth proportional to 1,398.56, 1,931.97 and 1,324.74 is: 1,830.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.56 : 1,931.97 = 1,324.74 : x
  2. Step 2: Convert to fraction form
    1,398.56/1,931.97 = 1,324.74/x
  3. Step 3: Cross multiply
    1,398.56x = 1,931.97 × 1,324.74
  4. Step 4: Simplify right side
    1,398.56x = 2,559,357.94
  5. Step 5: Solve for x
    x = 2,559,357.94/1,398.56
  6. Step 6: Final answer
    x = 1,830.00

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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.