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Finding the Fourth Proportional to 937.13, 1,405.69 and 389.32

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Solution

The fourth proportional to 937.13, 1,405.69 and 389.32 is: 583.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.13 : 1,405.69 = 389.32 : x
  2. Step 2: Convert to fraction form
    937.13/1,405.69 = 389.32/x
  3. Step 3: Cross multiply
    937.13x = 1,405.69 × 389.32
  4. Step 4: Simplify right side
    937.13x = 547,258.74
  5. Step 5: Solve for x
    x = 547,258.74/937.13
  6. Step 6: Final answer
    x = 583.98

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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.