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Finding the Fourth Proportional to 968.76, 1,337.33 and 619.65

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Solution

The fourth proportional to 968.76, 1,337.33 and 619.65 is: 855.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.76 : 1,337.33 = 619.65 : x
  2. Step 2: Convert to fraction form
    968.76/1,337.33 = 619.65/x
  3. Step 3: Cross multiply
    968.76x = 1,337.33 × 619.65
  4. Step 4: Simplify right side
    968.76x = 828,673.44
  5. Step 5: Solve for x
    x = 828,673.44/968.76
  6. Step 6: Final answer
    x = 855.40

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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.