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Finding the Fourth Proportional to 964.95, 1,330.30 and 610.69

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Solution

The fourth proportional to 964.95, 1,330.30 and 610.69 is: 841.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.95 : 1,330.30 = 610.69 : x
  2. Step 2: Convert to fraction form
    964.95/1,330.30 = 610.69/x
  3. Step 3: Cross multiply
    964.95x = 1,330.30 × 610.69
  4. Step 4: Simplify right side
    964.95x = 812,400.91
  5. Step 5: Solve for x
    x = 812,400.91/964.95
  6. Step 6: Final answer
    x = 841.91

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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.