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Finding the Fourth Proportional to 613,743.40, 919,059.90 and 489,327.40

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Solution

The fourth proportional to 613,743.40, 919,059.90 and 489,327.40 is: 732,751.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,743.40 : 919,059.90 = 489,327.40 : x
  2. Step 2: Convert to fraction form
    613,743.40/919,059.90 = 489,327.40/x
  3. Step 3: Cross multiply
    613,743.40x = 919,059.90 × 489,327.40
  4. Step 4: Simplify right side
    613,743.40x = 449,721,191,311.26
  5. Step 5: Solve for x
    x = 449,721,191,311.26/613,743.40
  6. Step 6: Final answer
    x = 732,751.16

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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.