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Finding the Fourth Proportional to 613,308.90, 919,635.30 and 257,921.40

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Solution

The fourth proportional to 613,308.90, 919,635.30 and 257,921.40 is: 386,744.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,308.90 : 919,635.30 = 257,921.40 : x
  2. Step 2: Convert to fraction form
    613,308.90/919,635.30 = 257,921.40/x
  3. Step 3: Cross multiply
    613,308.90x = 919,635.30 × 257,921.40
  4. Step 4: Simplify right side
    613,308.90x = 237,193,624,065.42
  5. Step 5: Solve for x
    x = 237,193,624,065.42/613,308.90
  6. Step 6: Final answer
    x = 386,744.14

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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.