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Finding the Fourth Proportional to 929.07, 1,392.57 and 441.09

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Solution

The fourth proportional to 929.07, 1,392.57 and 441.09 is: 661.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.07 : 1,392.57 = 441.09 : x
  2. Step 2: Convert to fraction form
    929.07/1,392.57 = 441.09/x
  3. Step 3: Cross multiply
    929.07x = 1,392.57 × 441.09
  4. Step 4: Simplify right side
    929.07x = 614,248.70
  5. Step 5: Solve for x
    x = 614,248.70/929.07
  6. Step 6: Final answer
    x = 661.14

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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.