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Finding the Fourth Proportional to 613,639.40, 919,911.90 and 239,575.40

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Solution

The fourth proportional to 613,639.40, 919,911.90 and 239,575.40 is: 359,149.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,639.40 : 919,911.90 = 239,575.40 : x
  2. Step 2: Convert to fraction form
    613,639.40/919,911.90 = 239,575.40/x
  3. Step 3: Cross multiply
    613,639.40x = 919,911.90 × 239,575.40
  4. Step 4: Simplify right side
    613,639.40x = 220,388,261,407.26
  5. Step 5: Solve for x
    x = 220,388,261,407.26/613,639.40
  6. Step 6: Final answer
    x = 359,149.46

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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.