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Finding the Fourth Proportional to 784.39, 1,176.30 and 351.25

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Solution

The fourth proportional to 784.39, 1,176.30 and 351.25 is: 526.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.39 : 1,176.30 = 351.25 : x
  2. Step 2: Convert to fraction form
    784.39/1,176.30 = 351.25/x
  3. Step 3: Cross multiply
    784.39x = 1,176.30 × 351.25
  4. Step 4: Simplify right side
    784.39x = 413,175.38
  5. Step 5: Solve for x
    x = 413,175.38/784.39
  6. Step 6: Final answer
    x = 526.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.