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Finding the Fourth Proportional to 2,590.24, 3,885.32 and 642.44

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Solution

The fourth proportional to 2,590.24, 3,885.32 and 642.44 is: 963.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,590.24 : 3,885.32 = 642.44 : x
  2. Step 2: Convert to fraction form
    2,590.24/3,885.32 = 642.44/x
  3. Step 3: Cross multiply
    2,590.24x = 3,885.32 × 642.44
  4. Step 4: Simplify right side
    2,590.24x = 2,496,084.98
  5. Step 5: Solve for x
    x = 2,496,084.98/2,590.24
  6. Step 6: Final answer
    x = 963.65

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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.