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Finding the Fourth Proportional to 1,264.40, 1,894.80 and 494

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Solution

The fourth proportional to 1,264.40, 1,894.80 and 494 is: 740.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.40 : 1,894.80 = 494 : x
  2. Step 2: Convert to fraction form
    1,264.40/1,894.80 = 494/x
  3. Step 3: Cross multiply
    1,264.40x = 1,894.80 × 494
  4. Step 4: Simplify right side
    1,264.40x = 936,031.20
  5. Step 5: Solve for x
    x = 936,031.20/1,264.40
  6. Step 6: Final answer
    x = 740.30

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.