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Finding the Fourth Proportional to 968.61, 1,337.27 and 619.50

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Solution

The fourth proportional to 968.61, 1,337.27 and 619.50 is: 855.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.61 : 1,337.27 = 619.50 : x
  2. Step 2: Convert to fraction form
    968.61/1,337.27 = 619.50/x
  3. Step 3: Cross multiply
    968.61x = 1,337.27 × 619.50
  4. Step 4: Simplify right side
    968.61x = 828,438.77
  5. Step 5: Solve for x
    x = 828,438.77/968.61
  6. Step 6: Final answer
    x = 855.29

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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.