Home / 1,927.59-2,658.58-1,398.45

Finding the Fourth Proportional to 1,927.59, 2,658.58 and 1,398.45

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Solution

The fourth proportional to 1,927.59, 2,658.58 and 1,398.45 is: 1,928.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,927.59 : 2,658.58 = 1,398.45 : x
  2. Step 2: Convert to fraction form
    1,927.59/2,658.58 = 1,398.45/x
  3. Step 3: Cross multiply
    1,927.59x = 2,658.58 × 1,398.45
  4. Step 4: Simplify right side
    1,927.59x = 3,717,891.20
  5. Step 5: Solve for x
    x = 3,717,891.20/1,927.59
  6. Step 6: Final answer
    x = 1,928.78

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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.