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Finding the Fourth Proportional to 499,508.35, 689,388.98 and 281,761.72

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Solution

The fourth proportional to 499,508.35, 689,388.98 and 281,761.72 is: 388,869.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,508.35 : 689,388.98 = 281,761.72 : x
  2. Step 2: Convert to fraction form
    499,508.35/689,388.98 = 281,761.72/x
  3. Step 3: Cross multiply
    499,508.35x = 689,388.98 × 281,761.72
  4. Step 4: Simplify right side
    499,508.35x = 194,243,421,621.57
  5. Step 5: Solve for x
    x = 194,243,421,621.57/499,508.35
  6. Step 6: Final answer
    x = 388,869.22

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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.