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Finding the Fourth Proportional to 926.81, 1,388.05 and 560.94

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Solution

The fourth proportional to 926.81, 1,388.05 and 560.94 is: 840.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.81 : 1,388.05 = 560.94 : x
  2. Step 2: Convert to fraction form
    926.81/1,388.05 = 560.94/x
  3. Step 3: Cross multiply
    926.81x = 1,388.05 × 560.94
  4. Step 4: Simplify right side
    926.81x = 778,611.36
  5. Step 5: Solve for x
    x = 778,611.36/926.81
  6. Step 6: Final answer
    x = 840.10

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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.