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Finding the Fourth Proportional to 340,487.78, 510,739.89 and 87,774.44

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Solution

The fourth proportional to 340,487.78, 510,739.89 and 87,774.44 is: 131,663.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,487.78 : 510,739.89 = 87,774.44 : x
  2. Step 2: Convert to fraction form
    340,487.78/510,739.89 = 87,774.44/x
  3. Step 3: Cross multiply
    340,487.78x = 510,739.89 × 87,774.44
  4. Step 4: Simplify right side
    340,487.78x = 44,829,907,830.41
  5. Step 5: Solve for x
    x = 44,829,907,830.41/340,487.78
  6. Step 6: Final answer
    x = 131,663.78

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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.