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Finding the Fourth Proportional to 369.61, 554.81 and 312.53

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Solution

The fourth proportional to 369.61, 554.81 and 312.53 is: 469.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.61 : 554.81 = 312.53 : x
  2. Step 2: Convert to fraction form
    369.61/554.81 = 312.53/x
  3. Step 3: Cross multiply
    369.61x = 554.81 × 312.53
  4. Step 4: Simplify right side
    369.61x = 173,394.77
  5. Step 5: Solve for x
    x = 173,394.77/369.61
  6. Step 6: Final answer
    x = 469.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.