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Finding the Fourth Proportional to 509.37, 702.94 and 288.32

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Solution

The fourth proportional to 509.37, 702.94 and 288.32 is: 397.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.37 : 702.94 = 288.32 : x
  2. Step 2: Convert to fraction form
    509.37/702.94 = 288.32/x
  3. Step 3: Cross multiply
    509.37x = 702.94 × 288.32
  4. Step 4: Simplify right side
    509.37x = 202,666.70
  5. Step 5: Solve for x
    x = 202,666.70/509.37
  6. Step 6: Final answer
    x = 397.88

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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.