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Finding the Fourth Proportional to 499,657.76, 689,334.02 and 318,337.22

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Solution

The fourth proportional to 499,657.76, 689,334.02 and 318,337.22 is: 439,181.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,657.76 : 689,334.02 = 318,337.22 : x
  2. Step 2: Convert to fraction form
    499,657.76/689,334.02 = 318,337.22/x
  3. Step 3: Cross multiply
    499,657.76x = 689,334.02 × 318,337.22
  4. Step 4: Simplify right side
    499,657.76x = 219,440,675,578.22
  5. Step 5: Solve for x
    x = 219,440,675,578.22/499,657.76
  6. Step 6: Final answer
    x = 439,181.96

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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.