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Finding the Fourth Proportional to 612,415.41, 918,721.67 and 213,169.65

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Solution

The fourth proportional to 612,415.41, 918,721.67 and 213,169.65 is: 319,788.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,415.41 : 918,721.67 = 213,169.65 : x
  2. Step 2: Convert to fraction form
    612,415.41/918,721.67 = 213,169.65/x
  3. Step 3: Cross multiply
    612,415.41x = 918,721.67 × 213,169.65
  4. Step 4: Simplify right side
    612,415.41x = 195,843,575,775.47
  5. Step 5: Solve for x
    x = 195,843,575,775.47/612,415.41
  6. Step 6: Final answer
    x = 319,788.78

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1.5x scale

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.