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Finding the Fourth Proportional to 587,211.60, 810,356.08 and 318,939.60

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Solution

The fourth proportional to 587,211.60, 810,356.08 and 318,939.60 is: 440,138.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,211.60 : 810,356.08 = 318,939.60 : x
  2. Step 2: Convert to fraction form
    587,211.60/810,356.08 = 318,939.60/x
  3. Step 3: Cross multiply
    587,211.60x = 810,356.08 × 318,939.60
  4. Step 4: Simplify right side
    587,211.60x = 258,454,644,012.77
  5. Step 5: Solve for x
    x = 258,454,644,012.77/587,211.60
  6. Step 6: Final answer
    x = 440,138.86

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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.