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Finding the Fourth Proportional to 931.77, 1,397.12 and 384.33

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Solution

The fourth proportional to 931.77, 1,397.12 and 384.33 is: 576.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.77 : 1,397.12 = 384.33 : x
  2. Step 2: Convert to fraction form
    931.77/1,397.12 = 384.33/x
  3. Step 3: Cross multiply
    931.77x = 1,397.12 × 384.33
  4. Step 4: Simplify right side
    931.77x = 536,953.21
  5. Step 5: Solve for x
    x = 536,953.21/931.77
  6. Step 6: Final answer
    x = 576.27

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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.