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Finding the Fourth Proportional to 518,898.60, 777,764.70 and 266,081.40

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Solution

The fourth proportional to 518,898.60, 777,764.70 and 266,081.40 is: 398,823.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,898.60 : 777,764.70 = 266,081.40 : x
  2. Step 2: Convert to fraction form
    518,898.60/777,764.70 = 266,081.40/x
  3. Step 3: Cross multiply
    518,898.60x = 777,764.70 × 266,081.40
  4. Step 4: Simplify right side
    518,898.60x = 206,948,720,246.58
  5. Step 5: Solve for x
    x = 206,948,720,246.58/518,898.60
  6. Step 6: Final answer
    x = 398,823.05

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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.