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Finding the Fourth Proportional to 613,799.40, 919,143.90 and 489,383.40

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Solution

The fourth proportional to 613,799.40, 919,143.90 and 489,383.40 is: 732,835.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,799.40 : 919,143.90 = 489,383.40 : x
  2. Step 2: Convert to fraction form
    613,799.40/919,143.90 = 489,383.40/x
  3. Step 3: Cross multiply
    613,799.40x = 919,143.90 × 489,383.40
  4. Step 4: Simplify right side
    613,799.40x = 449,813,766,871.26
  5. Step 5: Solve for x
    x = 449,813,766,871.26/613,799.40
  6. Step 6: Final answer
    x = 732,835.14

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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.