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Finding the Fourth Proportional to 415,798.78, 623,775.10 and 131,560.88

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Solution

The fourth proportional to 415,798.78, 623,775.10 and 131,560.88 is: 197,365.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,798.78 : 623,775.10 = 131,560.88 : x
  2. Step 2: Convert to fraction form
    415,798.78/623,775.10 = 131,560.88/x
  3. Step 3: Cross multiply
    415,798.78x = 623,775.10 × 131,560.88
  4. Step 4: Simplify right side
    415,798.78x = 82,064,402,801.98
  5. Step 5: Solve for x
    x = 82,064,402,801.98/415,798.78
  6. Step 6: Final answer
    x = 197,365.66

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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.