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Finding the Fourth Proportional to 1,785.30, 2,676.62 and 860.00

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Solution

The fourth proportional to 1,785.30, 2,676.62 and 860.00 is: 1,289.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.30 : 2,676.62 = 860.00 : x
  2. Step 2: Convert to fraction form
    1,785.30/2,676.62 = 860.00/x
  3. Step 3: Cross multiply
    1,785.30x = 2,676.62 × 860.00
  4. Step 4: Simplify right side
    1,785.30x = 2,301,875.52
  5. Step 5: Solve for x
    x = 2,301,875.52/1,785.30
  6. Step 6: Final answer
    x = 1,289.35

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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.