Home / 1,648.91-2,275.29-985.65

Finding the Fourth Proportional to 1,648.91, 2,275.29 and 985.65

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Solution

The fourth proportional to 1,648.91, 2,275.29 and 985.65 is: 1,360.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,648.91 : 2,275.29 = 985.65 : x
  2. Step 2: Convert to fraction form
    1,648.91/2,275.29 = 985.65/x
  3. Step 3: Cross multiply
    1,648.91x = 2,275.29 × 985.65
  4. Step 4: Simplify right side
    1,648.91x = 2,242,639.59
  5. Step 5: Solve for x
    x = 2,242,639.59/1,648.91
  6. Step 6: Final answer
    x = 1,360.08

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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.