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Finding the Fourth Proportional to 486,699.78, 671,641.75 and 268,907.77

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Solution

The fourth proportional to 486,699.78, 671,641.75 and 268,907.77 is: 371,090.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,699.78 : 671,641.75 = 268,907.77 : x
  2. Step 2: Convert to fraction form
    486,699.78/671,641.75 = 268,907.77/x
  3. Step 3: Cross multiply
    486,699.78x = 671,641.75 × 268,907.77
  4. Step 4: Simplify right side
    486,699.78x = 180,609,681,872.80
  5. Step 5: Solve for x
    x = 180,609,681,872.80/486,699.78
  6. Step 6: Final answer
    x = 371,090.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.