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Finding the Fourth Proportional to 398,864.40, 597,490.20 and 248,643.60

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Solution

The fourth proportional to 398,864.40, 597,490.20 and 248,643.60 is: 372,462.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,864.40 : 597,490.20 = 248,643.60 : x
  2. Step 2: Convert to fraction form
    398,864.40/597,490.20 = 248,643.60/x
  3. Step 3: Cross multiply
    398,864.40x = 597,490.20 × 248,643.60
  4. Step 4: Simplify right side
    398,864.40x = 148,562,114,292.72
  5. Step 5: Solve for x
    x = 148,562,114,292.72/398,864.40
  6. Step 6: Final answer
    x = 372,462.71

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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.