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Finding the Fourth Proportional to 1,771.74, 2,444.79 and 985.68

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Solution

The fourth proportional to 1,771.74, 2,444.79 and 985.68 is: 1,360.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.74 : 2,444.79 = 985.68 : x
  2. Step 2: Convert to fraction form
    1,771.74/2,444.79 = 985.68/x
  3. Step 3: Cross multiply
    1,771.74x = 2,444.79 × 985.68
  4. Step 4: Simplify right side
    1,771.74x = 2,409,780.61
  5. Step 5: Solve for x
    x = 2,409,780.61/1,771.74
  6. Step 6: Final answer
    x = 1,360.12

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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.