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Finding the Fourth Proportional to 503.51, 753.89 and 381.40

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Solution

The fourth proportional to 503.51, 753.89 and 381.40 is: 571.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.51 : 753.89 = 381.40 : x
  2. Step 2: Convert to fraction form
    503.51/753.89 = 381.40/x
  3. Step 3: Cross multiply
    503.51x = 753.89 × 381.40
  4. Step 4: Simplify right side
    503.51x = 287,533.65
  5. Step 5: Solve for x
    x = 287,533.65/503.51
  6. Step 6: Final answer
    x = 571.06

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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.