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Finding the Fourth Proportional to 3,089, 4,260.90 and 2,345.78

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Solution

The fourth proportional to 3,089, 4,260.90 and 2,345.78 is: 3,235.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,089 : 4,260.90 = 2,345.78 : x
  2. Step 2: Convert to fraction form
    3,089/4,260.90 = 2,345.78/x
  3. Step 3: Cross multiply
    3,089x = 4,260.90 × 2,345.78
  4. Step 4: Simplify right side
    3,089x = 9,995,134.00
  5. Step 5: Solve for x
    x = 9,995,134.00/3,089
  6. Step 6: Final answer
    x = 3,235.72

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1.5x scale

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.