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Finding the Fourth Proportional to 509.32, 702.40 and 322.60

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Solution

The fourth proportional to 509.32, 702.40 and 322.60 is: 444.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.32 : 702.40 = 322.60 : x
  2. Step 2: Convert to fraction form
    509.32/702.40 = 322.60/x
  3. Step 3: Cross multiply
    509.32x = 702.40 × 322.60
  4. Step 4: Simplify right side
    509.32x = 226,594.24
  5. Step 5: Solve for x
    x = 226,594.24/509.32
  6. Step 6: Final answer
    x = 444.90

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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.