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Finding the Fourth Proportional to 1,774.80, 2,448.90 and 988.74

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Solution

The fourth proportional to 1,774.80, 2,448.90 and 988.74 is: 1,364.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,774.80 : 2,448.90 = 988.74 : x
  2. Step 2: Convert to fraction form
    1,774.80/2,448.90 = 988.74/x
  3. Step 3: Cross multiply
    1,774.80x = 2,448.90 × 988.74
  4. Step 4: Simplify right side
    1,774.80x = 2,421,325.39
  5. Step 5: Solve for x
    x = 2,421,325.39/1,774.80
  6. Step 6: Final answer
    x = 1,364.28

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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.