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Finding the Fourth Proportional to 933.01, 1,398.70 and 384.81

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Solution

The fourth proportional to 933.01, 1,398.70 and 384.81 is: 576.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.01 : 1,398.70 = 384.81 : x
  2. Step 2: Convert to fraction form
    933.01/1,398.70 = 384.81/x
  3. Step 3: Cross multiply
    933.01x = 1,398.70 × 384.81
  4. Step 4: Simplify right side
    933.01x = 538,231.82
  5. Step 5: Solve for x
    x = 538,231.82/933.01
  6. Step 6: Final answer
    x = 576.88

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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.