Home / 1,648.99-2,275.45-985.69

Finding the Fourth Proportional to 1,648.99, 2,275.45 and 985.69

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Solution

The fourth proportional to 1,648.99, 2,275.45 and 985.69 is: 1,360.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,648.99 : 2,275.45 = 985.69 : x
  2. Step 2: Convert to fraction form
    1,648.99/2,275.45 = 985.69/x
  3. Step 3: Cross multiply
    1,648.99x = 2,275.45 × 985.69
  4. Step 4: Simplify right side
    1,648.99x = 2,242,888.31
  5. Step 5: Solve for x
    x = 2,242,888.31/1,648.99
  6. Step 6: Final answer
    x = 1,360.16

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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.