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Finding the Fourth Proportional to 555,449.60, 766,521.60 and 300,800

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Solution

The fourth proportional to 555,449.60, 766,521.60 and 300,800 is: 415,104.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,449.60 : 766,521.60 = 300,800 : x
  2. Step 2: Convert to fraction form
    555,449.60/766,521.60 = 300,800/x
  3. Step 3: Cross multiply
    555,449.60x = 766,521.60 × 300,800
  4. Step 4: Simplify right side
    555,449.60x = 230,569,697,280
  5. Step 5: Solve for x
    x = 230,569,697,280/555,449.60
  6. Step 6: Final answer
    x = 415,104.62

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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.