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Finding the Fourth Proportional to 418,779.49, 627,915.55 and 187,926.15

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Solution

The fourth proportional to 418,779.49, 627,915.55 and 187,926.15 is: 281,775.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,779.49 : 627,915.55 = 187,926.15 : x
  2. Step 2: Convert to fraction form
    418,779.49/627,915.55 = 187,926.15/x
  3. Step 3: Cross multiply
    418,779.49x = 627,915.55 × 187,926.15
  4. Step 4: Simplify right side
    418,779.49x = 118,001,751,836.63
  5. Step 5: Solve for x
    x = 118,001,751,836.63/418,779.49
  6. Step 6: Final answer
    x = 281,775.38

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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.