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Finding the Fourth Proportional to 833.62, 1,148.88 and 668.38

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Solution

The fourth proportional to 833.62, 1,148.88 and 668.38 is: 921.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.62 : 1,148.88 = 668.38 : x
  2. Step 2: Convert to fraction form
    833.62/1,148.88 = 668.38/x
  3. Step 3: Cross multiply
    833.62x = 1,148.88 × 668.38
  4. Step 4: Simplify right side
    833.62x = 767,888.41
  5. Step 5: Solve for x
    x = 767,888.41/833.62
  6. Step 6: Final answer
    x = 921.15

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1.5x scale

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.