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Finding the Fourth Proportional to 509.08, 702.48 and 322.66

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Solution

The fourth proportional to 509.08, 702.48 and 322.66 is: 445.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.08 : 702.48 = 322.66 : x
  2. Step 2: Convert to fraction form
    509.08/702.48 = 322.66/x
  3. Step 3: Cross multiply
    509.08x = 702.48 × 322.66
  4. Step 4: Simplify right side
    509.08x = 226,662.20
  5. Step 5: Solve for x
    x = 226,662.20/509.08
  6. Step 6: Final answer
    x = 445.24

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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.