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Finding the Fourth Proportional to 398,910.30, 597,381.30 and 265,065.90

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Solution

The fourth proportional to 398,910.30, 597,381.30 and 265,065.90 is: 396,944.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,910.30 : 597,381.30 = 265,065.90 : x
  2. Step 2: Convert to fraction form
    398,910.30/597,381.30 = 265,065.90/x
  3. Step 3: Cross multiply
    398,910.30x = 597,381.30 × 265,065.90
  4. Step 4: Simplify right side
    398,910.30x = 158,345,411,927.67
  5. Step 5: Solve for x
    x = 158,345,411,927.67/398,910.30
  6. Step 6: Final answer
    x = 396,944.91

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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.