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Finding the Fourth Proportional to 926.59, 1,389.08 and 349.87

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Solution

The fourth proportional to 926.59, 1,389.08 and 349.87 is: 524.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.59 : 1,389.08 = 349.87 : x
  2. Step 2: Convert to fraction form
    926.59/1,389.08 = 349.87/x
  3. Step 3: Cross multiply
    926.59x = 1,389.08 × 349.87
  4. Step 4: Simplify right side
    926.59x = 485,997.42
  5. Step 5: Solve for x
    x = 485,997.42/926.59
  6. Step 6: Final answer
    x = 524.50

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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.