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Finding the Fourth Proportional to 612,787.78, 845,647.14 and 344,515.78

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Solution

The fourth proportional to 612,787.78, 845,647.14 and 344,515.78 is: 475,431.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,787.78 : 845,647.14 = 344,515.78 : x
  2. Step 2: Convert to fraction form
    612,787.78/845,647.14 = 344,515.78/x
  3. Step 3: Cross multiply
    612,787.78x = 845,647.14 × 344,515.78
  4. Step 4: Simplify right side
    612,787.78x = 291,338,784,452.96
  5. Step 5: Solve for x
    x = 291,338,784,452.96/612,787.78
  6. Step 6: Final answer
    x = 475,431.78

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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.