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Finding the Fourth Proportional to 503.91, 758.57 and 388.98

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Solution

The fourth proportional to 503.91, 758.57 and 388.98 is: 585.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.91 : 758.57 = 388.98 : x
  2. Step 2: Convert to fraction form
    503.91/758.57 = 388.98/x
  3. Step 3: Cross multiply
    503.91x = 758.57 × 388.98
  4. Step 4: Simplify right side
    503.91x = 295,066.61
  5. Step 5: Solve for x
    x = 295,066.61/503.91
  6. Step 6: Final answer
    x = 585.55

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.