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Finding the Fourth Proportional to 926.01, 1,389.26 and 406.06

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Solution

The fourth proportional to 926.01, 1,389.26 and 406.06 is: 609.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.01 : 1,389.26 = 406.06 : x
  2. Step 2: Convert to fraction form
    926.01/1,389.26 = 406.06/x
  3. Step 3: Cross multiply
    926.01x = 1,389.26 × 406.06
  4. Step 4: Simplify right side
    926.01x = 564,120.46
  5. Step 5: Solve for x
    x = 564,120.46/926.01
  6. Step 6: Final answer
    x = 609.19

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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.