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Finding the Fourth Proportional to 1,651.39, 2,278.33 and 988.00

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Solution

The fourth proportional to 1,651.39, 2,278.33 and 988.00 is: 1,363.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,651.39 : 2,278.33 = 988.00 : x
  2. Step 2: Convert to fraction form
    1,651.39/2,278.33 = 988.00/x
  3. Step 3: Cross multiply
    1,651.39x = 2,278.33 × 988.00
  4. Step 4: Simplify right side
    1,651.39x = 2,250,981.87
  5. Step 5: Solve for x
    x = 2,250,981.87/1,651.39
  6. Step 6: Final answer
    x = 1,363.09

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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.