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Finding the Fourth Proportional to 1,886.76, 2,830.32 and 653.88

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Solution

The fourth proportional to 1,886.76, 2,830.32 and 653.88 is: 980.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.76 : 2,830.32 = 653.88 : x
  2. Step 2: Convert to fraction form
    1,886.76/2,830.32 = 653.88/x
  3. Step 3: Cross multiply
    1,886.76x = 2,830.32 × 653.88
  4. Step 4: Simplify right side
    1,886.76x = 1,850,689.64
  5. Step 5: Solve for x
    x = 1,850,689.64/1,886.76
  6. Step 6: Final answer
    x = 980.88

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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.