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Finding the Fourth Proportional to 1,590.15, 2,385.72 and 494.64

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Solution

The fourth proportional to 1,590.15, 2,385.72 and 494.64 is: 742.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.15 : 2,385.72 = 494.64 : x
  2. Step 2: Convert to fraction form
    1,590.15/2,385.72 = 494.64/x
  3. Step 3: Cross multiply
    1,590.15x = 2,385.72 × 494.64
  4. Step 4: Simplify right side
    1,590.15x = 1,180,072.54
  5. Step 5: Solve for x
    x = 1,180,072.54/1,590.15
  6. Step 6: Final answer
    x = 742.11

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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.