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Finding the Fourth Proportional to 509.29, 702.88 and 322.99

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Solution

The fourth proportional to 509.29, 702.88 and 322.99 is: 445.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.29 : 702.88 = 322.99 : x
  2. Step 2: Convert to fraction form
    509.29/702.88 = 322.99/x
  3. Step 3: Cross multiply
    509.29x = 702.88 × 322.99
  4. Step 4: Simplify right side
    509.29x = 227,020.65
  5. Step 5: Solve for x
    x = 227,020.65/509.29
  6. Step 6: Final answer
    x = 445.76

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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.