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Finding the Fourth Proportional to 926.00, 1,389.23 and 309.71

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Solution

The fourth proportional to 926.00, 1,389.23 and 309.71 is: 464.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.00 : 1,389.23 = 309.71 : x
  2. Step 2: Convert to fraction form
    926.00/1,389.23 = 309.71/x
  3. Step 3: Cross multiply
    926.00x = 1,389.23 × 309.71
  4. Step 4: Simplify right side
    926.00x = 430,249.93
  5. Step 5: Solve for x
    x = 430,249.93/926.00
  6. Step 6: Final answer
    x = 464.64

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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.