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Finding the Fourth Proportional to 369.16, 508.98 and 305.08

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Solution

The fourth proportional to 369.16, 508.98 and 305.08 is: 420.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.16 : 508.98 = 305.08 : x
  2. Step 2: Convert to fraction form
    369.16/508.98 = 305.08/x
  3. Step 3: Cross multiply
    369.16x = 508.98 × 305.08
  4. Step 4: Simplify right side
    369.16x = 155,282.35
  5. Step 5: Solve for x
    x = 155,282.35/369.16
  6. Step 6: Final answer
    x = 420.64

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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.