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Finding the Fourth Proportional to 968.35, 1,337.21 and 619.65

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Solution

The fourth proportional to 968.35, 1,337.21 and 619.65 is: 855.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.35 : 1,337.21 = 619.65 : x
  2. Step 2: Convert to fraction form
    968.35/1,337.21 = 619.65/x
  3. Step 3: Cross multiply
    968.35x = 1,337.21 × 619.65
  4. Step 4: Simplify right side
    968.35x = 828,602.18
  5. Step 5: Solve for x
    x = 828,602.18/968.35
  6. Step 6: Final answer
    x = 855.68

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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.