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Finding the Fourth Proportional to 369.48, 551.08 and 312.08

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Solution

The fourth proportional to 369.48, 551.08 and 312.08 is: 465.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.48 : 551.08 = 312.08 : x
  2. Step 2: Convert to fraction form
    369.48/551.08 = 312.08/x
  3. Step 3: Cross multiply
    369.48x = 551.08 × 312.08
  4. Step 4: Simplify right side
    369.48x = 171,981.05
  5. Step 5: Solve for x
    x = 171,981.05/369.48
  6. Step 6: Final answer
    x = 465.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.