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Finding the Fourth Proportional to 509.95, 702.64 and 343.87

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Solution

The fourth proportional to 509.95, 702.64 and 343.87 is: 473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.95 : 702.64 = 343.87 : x
  2. Step 2: Convert to fraction form
    509.95/702.64 = 343.87/x
  3. Step 3: Cross multiply
    509.95x = 702.64 × 343.87
  4. Step 4: Simplify right side
    509.95x = 241,614.20
  5. Step 5: Solve for x
    x = 241,614.20/509.95
  6. Step 6: Final answer
    x = 473.80

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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.