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Finding the Fourth Proportional to 746.86, 1,119.90 and 351.12

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Solution

The fourth proportional to 746.86, 1,119.90 and 351.12 is: 526.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.86 : 1,119.90 = 351.12 : x
  2. Step 2: Convert to fraction form
    746.86/1,119.90 = 351.12/x
  3. Step 3: Cross multiply
    746.86x = 1,119.90 × 351.12
  4. Step 4: Simplify right side
    746.86x = 393,219.29
  5. Step 5: Solve for x
    x = 393,219.29/746.86
  6. Step 6: Final answer
    x = 526.50

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Double scale
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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.