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Finding the Fourth Proportional to 509, 702.58 and 325

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Solution

The fourth proportional to 509, 702.58 and 325 is: 448.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    509 : 702.58 = 325 : x
  2. Step 2: Convert to fraction form
    509/702.58 = 325/x
  3. Step 3: Cross multiply
    509x = 702.58 × 325
  4. Step 4: Simplify right side
    509x = 228,338.50
  5. Step 5: Solve for x
    x = 228,338.50/509
  6. Step 6: Final answer
    x = 448.60

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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.