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Finding the Fourth Proportional to 807.24, 1,210.56 and 345.24

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Solution

The fourth proportional to 807.24, 1,210.56 and 345.24 is: 517.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.24 : 1,210.56 = 345.24 : x
  2. Step 2: Convert to fraction form
    807.24/1,210.56 = 345.24/x
  3. Step 3: Cross multiply
    807.24x = 1,210.56 × 345.24
  4. Step 4: Simplify right side
    807.24x = 417,933.73
  5. Step 5: Solve for x
    x = 417,933.73/807.24
  6. Step 6: Final answer
    x = 517.73

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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.