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Finding the Fourth Proportional to 915.82, 1,374.39 and 368.15

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Solution

The fourth proportional to 915.82, 1,374.39 and 368.15 is: 552.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.82 : 1,374.39 = 368.15 : x
  2. Step 2: Convert to fraction form
    915.82/1,374.39 = 368.15/x
  3. Step 3: Cross multiply
    915.82x = 1,374.39 × 368.15
  4. Step 4: Simplify right side
    915.82x = 505,981.68
  5. Step 5: Solve for x
    x = 505,981.68/915.82
  6. Step 6: Final answer
    x = 552.49

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Double scale
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1.5x scale

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.