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Finding the Fourth Proportional to 624,647.78, 862,012.85 and 338,167.79

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Solution

The fourth proportional to 624,647.78, 862,012.85 and 338,167.79 is: 466,670.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,647.78 : 862,012.85 = 338,167.79 : x
  2. Step 2: Convert to fraction form
    624,647.78/862,012.85 = 338,167.79/x
  3. Step 3: Cross multiply
    624,647.78x = 862,012.85 × 338,167.79
  4. Step 4: Simplify right side
    624,647.78x = 291,504,976,971.46
  5. Step 5: Solve for x
    x = 291,504,976,971.46/624,647.78
  6. Step 6: Final answer
    x = 466,670.96

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1.5x scale

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.