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Finding the Fourth Proportional to 1,774.78, 2,448.85 and 988.68

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Solution

The fourth proportional to 1,774.78, 2,448.85 and 988.68 is: 1,364.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,774.78 : 2,448.85 = 988.68 : x
  2. Step 2: Convert to fraction form
    1,774.78/2,448.85 = 988.68/x
  3. Step 3: Cross multiply
    1,774.78x = 2,448.85 × 988.68
  4. Step 4: Simplify right side
    1,774.78x = 2,421,129.02
  5. Step 5: Solve for x
    x = 2,421,129.02/1,774.78
  6. Step 6: Final answer
    x = 1,364.19

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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.