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Finding the Fourth Proportional to 613,009.20, 919,513.80 and 443,735.40

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Solution

The fourth proportional to 613,009.20, 919,513.80 and 443,735.40 is: 665,603.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,009.20 : 919,513.80 = 443,735.40 : x
  2. Step 2: Convert to fraction form
    613,009.20/919,513.80 = 443,735.40/x
  3. Step 3: Cross multiply
    613,009.20x = 919,513.80 × 443,735.40
  4. Step 4: Simplify right side
    613,009.20x = 408,020,823,848.52
  5. Step 5: Solve for x
    x = 408,020,823,848.52/613,009.20
  6. Step 6: Final answer
    x = 665,603.10

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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.