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Finding the Fourth Proportional to 1,626.85, 2,440.70 and 456.86

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Solution

The fourth proportional to 1,626.85, 2,440.70 and 456.86 is: 685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,626.85 : 2,440.70 = 456.86 : x
  2. Step 2: Convert to fraction form
    1,626.85/2,440.70 = 456.86/x
  3. Step 3: Cross multiply
    1,626.85x = 2,440.70 × 456.86
  4. Step 4: Simplify right side
    1,626.85x = 1,115,043.71
  5. Step 5: Solve for x
    x = 1,115,043.71/1,626.85
  6. Step 6: Final answer
    x = 685.40

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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.