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Finding the Fourth Proportional to 782.00, 1,078.00 and 615.88

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Solution

The fourth proportional to 782.00, 1,078.00 and 615.88 is: 849.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.00 : 1,078.00 = 615.88 : x
  2. Step 2: Convert to fraction form
    782.00/1,078.00 = 615.88/x
  3. Step 3: Cross multiply
    782.00x = 1,078.00 × 615.88
  4. Step 4: Simplify right side
    782.00x = 663,914.41
  5. Step 5: Solve for x
    x = 663,914.41/782.00
  6. Step 6: Final answer
    x = 849.00

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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.