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Finding the Fourth Proportional to 1,490.58, 2,235.97 and 394.91

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Solution

The fourth proportional to 1,490.58, 2,235.97 and 394.91 is: 592.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.58 : 2,235.97 = 394.91 : x
  2. Step 2: Convert to fraction form
    1,490.58/2,235.97 = 394.91/x
  3. Step 3: Cross multiply
    1,490.58x = 2,235.97 × 394.91
  4. Step 4: Simplify right side
    1,490.58x = 883,004.61
  5. Step 5: Solve for x
    x = 883,004.61/1,490.58
  6. Step 6: Final answer
    x = 592.39

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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.