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Finding the Fourth Proportional to 1,704, 2,352.50 and 1,289.28

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Solution

The fourth proportional to 1,704, 2,352.50 and 1,289.28 is: 1,779.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,704 : 2,352.50 = 1,289.28 : x
  2. Step 2: Convert to fraction form
    1,704/2,352.50 = 1,289.28/x
  3. Step 3: Cross multiply
    1,704x = 2,352.50 × 1,289.28
  4. Step 4: Simplify right side
    1,704x = 3,033,031.20
  5. Step 5: Solve for x
    x = 3,033,031.20/1,704
  6. Step 6: Final answer
    x = 1,779.95

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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.