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Finding the Fourth Proportional to 418,868.78, 627,986.72 and 208,655.42

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Solution

The fourth proportional to 418,868.78, 627,986.72 and 208,655.42 is: 312,825.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,868.78 : 627,986.72 = 208,655.42 : x
  2. Step 2: Convert to fraction form
    418,868.78/627,986.72 = 208,655.42/x
  3. Step 3: Cross multiply
    418,868.78x = 627,986.72 × 208,655.42
  4. Step 4: Simplify right side
    418,868.78x = 131,032,830,197.73
  5. Step 5: Solve for x
    x = 131,032,830,197.73/418,868.78
  6. Step 6: Final answer
    x = 312,825.49

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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.