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Finding the Fourth Proportional to 418,886.65, 628,122.29 and 148,974.31

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Solution

The fourth proportional to 418,886.65, 628,122.29 and 148,974.31 is: 223,387.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,886.65 : 628,122.29 = 148,974.31 : x
  2. Step 2: Convert to fraction form
    418,886.65/628,122.29 = 148,974.31/x
  3. Step 3: Cross multiply
    418,886.65x = 628,122.29 × 148,974.31
  4. Step 4: Simplify right side
    418,886.65x = 93,574,083,550.50
  5. Step 5: Solve for x
    x = 93,574,083,550.50/418,886.65
  6. Step 6: Final answer
    x = 223,387.60

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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.