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Finding the Fourth Proportional to 994.32, 1,492.10 and 378.08

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Solution

The fourth proportional to 994.32, 1,492.10 and 378.08 is: 567.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.32 : 1,492.10 = 378.08 : x
  2. Step 2: Convert to fraction form
    994.32/1,492.10 = 378.08/x
  3. Step 3: Cross multiply
    994.32x = 1,492.10 × 378.08
  4. Step 4: Simplify right side
    994.32x = 564,126.65
  5. Step 5: Solve for x
    x = 564,126.65/994.32
  6. Step 6: Final answer
    x = 567.35

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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.