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Finding the Fourth Proportional to 620,578.49, 930,849.20 and 171,326.78

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Solution

The fourth proportional to 620,578.49, 930,849.20 and 171,326.78 is: 256,985.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,578.49 : 930,849.20 = 171,326.78 : x
  2. Step 2: Convert to fraction form
    620,578.49/930,849.20 = 171,326.78/x
  3. Step 3: Cross multiply
    620,578.49x = 930,849.20 × 171,326.78
  4. Step 4: Simplify right side
    620,578.49x = 159,479,390,590.70
  5. Step 5: Solve for x
    x = 159,479,390,590.70/620,578.49
  6. Step 6: Final answer
    x = 256,985.05

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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.