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Finding the Fourth Proportional to 1,672.84, 2,511.12 and 980.32

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Solution

The fourth proportional to 1,672.84, 2,511.12 and 980.32 is: 1,471.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.84 : 2,511.12 = 980.32 : x
  2. Step 2: Convert to fraction form
    1,672.84/2,511.12 = 980.32/x
  3. Step 3: Cross multiply
    1,672.84x = 2,511.12 × 980.32
  4. Step 4: Simplify right side
    1,672.84x = 2,461,701.16
  5. Step 5: Solve for x
    x = 2,461,701.16/1,672.84
  6. Step 6: Final answer
    x = 1,471.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.