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Finding the Fourth Proportional to 369.36, 509.90 and 368.15

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Solution

The fourth proportional to 369.36, 509.90 and 368.15 is: 508.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.36 : 509.90 = 368.15 : x
  2. Step 2: Convert to fraction form
    369.36/509.90 = 368.15/x
  3. Step 3: Cross multiply
    369.36x = 509.90 × 368.15
  4. Step 4: Simplify right side
    369.36x = 187,715.29
  5. Step 5: Solve for x
    x = 187,715.29/369.36
  6. Step 6: Final answer
    x = 508.22

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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.