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Finding the Fourth Proportional to 509.36, 702.90 and 288.27

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Solution

The fourth proportional to 509.36, 702.90 and 288.27 is: 397.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.36 : 702.90 = 288.27 : x
  2. Step 2: Convert to fraction form
    509.36/702.90 = 288.27/x
  3. Step 3: Cross multiply
    509.36x = 702.90 × 288.27
  4. Step 4: Simplify right side
    509.36x = 202,624.98
  5. Step 5: Solve for x
    x = 202,624.98/509.36
  6. Step 6: Final answer
    x = 397.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.