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Finding the Fourth Proportional to 418,885.90, 628,121.17 and 148,973.56

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Solution

The fourth proportional to 418,885.90, 628,121.17 and 148,973.56 is: 223,386.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,885.90 : 628,121.17 = 148,973.56 : x
  2. Step 2: Convert to fraction form
    418,885.90/628,121.17 = 148,973.56/x
  3. Step 3: Cross multiply
    418,885.90x = 628,121.17 × 148,973.56
  4. Step 4: Simplify right side
    418,885.90x = 93,573,445,422.18
  5. Step 5: Solve for x
    x = 93,573,445,422.18/418,885.90
  6. Step 6: Final answer
    x = 223,386.48

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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.