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Finding the Fourth Proportional to 964.69, 1,332.78 and 632.99

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Solution

The fourth proportional to 964.69, 1,332.78 and 632.99 is: 874.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.69 : 1,332.78 = 632.99 : x
  2. Step 2: Convert to fraction form
    964.69/1,332.78 = 632.99/x
  3. Step 3: Cross multiply
    964.69x = 1,332.78 × 632.99
  4. Step 4: Simplify right side
    964.69x = 843,636.41
  5. Step 5: Solve for x
    x = 843,636.41/964.69
  6. Step 6: Final answer
    x = 874.52

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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.