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Finding the Fourth Proportional to 613,293.90, 919,612.80 and 257,906.40

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Solution

The fourth proportional to 613,293.90, 919,612.80 and 257,906.40 is: 386,721.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,293.90 : 919,612.80 = 257,906.40 : x
  2. Step 2: Convert to fraction form
    613,293.90/919,612.80 = 257,906.40/x
  3. Step 3: Cross multiply
    613,293.90x = 919,612.80 × 257,906.40
  4. Step 4: Simplify right side
    613,293.90x = 237,174,026,641.92
  5. Step 5: Solve for x
    x = 237,174,026,641.92/613,293.90
  6. Step 6: Final answer
    x = 386,721.65

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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.