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Finding the Fourth Proportional to 1,748.12, 2,620.55 and 651.65

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Solution

The fourth proportional to 1,748.12, 2,620.55 and 651.65 is: 976.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,748.12 : 2,620.55 = 651.65 : x
  2. Step 2: Convert to fraction form
    1,748.12/2,620.55 = 651.65/x
  3. Step 3: Cross multiply
    1,748.12x = 2,620.55 × 651.65
  4. Step 4: Simplify right side
    1,748.12x = 1,707,669.93
  5. Step 5: Solve for x
    x = 1,707,669.93/1,748.12
  6. Step 6: Final answer
    x = 976.86

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1.5x scale

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.