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Finding the Fourth Proportional to 418,290.76, 627,434.56 and 118,771.36

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Solution

The fourth proportional to 418,290.76, 627,434.56 and 118,771.36 is: 178,156.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,290.76 : 627,434.56 = 118,771.36 : x
  2. Step 2: Convert to fraction form
    418,290.76/627,434.56 = 118,771.36/x
  3. Step 3: Cross multiply
    418,290.76x = 627,434.56 × 118,771.36
  4. Step 4: Simplify right side
    418,290.76x = 74,521,256,002.20
  5. Step 5: Solve for x
    x = 74,521,256,002.20/418,290.76
  6. Step 6: Final answer
    x = 178,156.59

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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.