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Finding the Fourth Proportional to 518,079.50, 777,083.58 and 318,430.70

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Solution

The fourth proportional to 518,079.50, 777,083.58 and 318,430.70 is: 477,624.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,079.50 : 777,083.58 = 318,430.70 : x
  2. Step 2: Convert to fraction form
    518,079.50/777,083.58 = 318,430.70/x
  3. Step 3: Cross multiply
    518,079.50x = 777,083.58 × 318,430.70
  4. Step 4: Simplify right side
    518,079.50x = 247,447,268,337.91
  5. Step 5: Solve for x
    x = 247,447,268,337.91/518,079.50
  6. Step 6: Final answer
    x = 477,624.13

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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.