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Finding the Fourth Proportional to 1,744.42, 2,616.63 and 647.50

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Solution

The fourth proportional to 1,744.42, 2,616.63 and 647.50 is: 971.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,744.42 : 2,616.63 = 647.50 : x
  2. Step 2: Convert to fraction form
    1,744.42/2,616.63 = 647.50/x
  3. Step 3: Cross multiply
    1,744.42x = 2,616.63 × 647.50
  4. Step 4: Simplify right side
    1,744.42x = 1,694,267.93
  5. Step 5: Solve for x
    x = 1,694,267.93/1,744.42
  6. Step 6: Final answer
    x = 971.25

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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.