Home / 1,781.49-2,458.40-984.81

Finding the Fourth Proportional to 1,781.49, 2,458.40 and 984.81

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Solution

The fourth proportional to 1,781.49, 2,458.40 and 984.81 is: 1,359.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.49 : 2,458.40 = 984.81 : x
  2. Step 2: Convert to fraction form
    1,781.49/2,458.40 = 984.81/x
  3. Step 3: Cross multiply
    1,781.49x = 2,458.40 × 984.81
  4. Step 4: Simplify right side
    1,781.49x = 2,421,044.61
  5. Step 5: Solve for x
    x = 2,421,044.61/1,781.49
  6. Step 6: Final answer
    x = 1,359.00

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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.