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Finding the Fourth Proportional to 509.71, 702.96 and 322.99

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Solution

The fourth proportional to 509.71, 702.96 and 322.99 is: 445.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.71 : 702.96 = 322.99 : x
  2. Step 2: Convert to fraction form
    509.71/702.96 = 322.99/x
  3. Step 3: Cross multiply
    509.71x = 702.96 × 322.99
  4. Step 4: Simplify right side
    509.71x = 227,049.05
  5. Step 5: Solve for x
    x = 227,049.05/509.71
  6. Step 6: Final answer
    x = 445.45

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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.