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Finding the Fourth Proportional to 946.18, 1,419.09 and 321.51

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Solution

The fourth proportional to 946.18, 1,419.09 and 321.51 is: 482.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.18 : 1,419.09 = 321.51 : x
  2. Step 2: Convert to fraction form
    946.18/1,419.09 = 321.51/x
  3. Step 3: Cross multiply
    946.18x = 1,419.09 × 321.51
  4. Step 4: Simplify right side
    946.18x = 456,251.63
  5. Step 5: Solve for x
    x = 456,251.63/946.18
  6. Step 6: Final answer
    x = 482.20

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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.