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Finding the Fourth Proportional to 968.94, 1,337.44 and 619.63

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Solution

The fourth proportional to 968.94, 1,337.44 and 619.63 is: 855.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.94 : 1,337.44 = 619.63 : x
  2. Step 2: Convert to fraction form
    968.94/1,337.44 = 619.63/x
  3. Step 3: Cross multiply
    968.94x = 1,337.44 × 619.63
  4. Step 4: Simplify right side
    968.94x = 828,717.95
  5. Step 5: Solve for x
    x = 828,717.95/968.94
  6. Step 6: Final answer
    x = 855.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.