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Finding the Fourth Proportional to 926.32, 1,390.41 and 464.43

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Solution

The fourth proportional to 926.32, 1,390.41 and 464.43 is: 697.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.32 : 1,390.41 = 464.43 : x
  2. Step 2: Convert to fraction form
    926.32/1,390.41 = 464.43/x
  3. Step 3: Cross multiply
    926.32x = 1,390.41 × 464.43
  4. Step 4: Simplify right side
    926.32x = 645,748.12
  5. Step 5: Solve for x
    x = 645,748.12/926.32
  6. Step 6: Final answer
    x = 697.11

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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.