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Finding the Fourth Proportional to 931.58, 1,395.76 and 565.60

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Solution

The fourth proportional to 931.58, 1,395.76 and 565.60 is: 847.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.58 : 1,395.76 = 565.60 : x
  2. Step 2: Convert to fraction form
    931.58/1,395.76 = 565.60/x
  3. Step 3: Cross multiply
    931.58x = 1,395.76 × 565.60
  4. Step 4: Simplify right side
    931.58x = 789,436.95
  5. Step 5: Solve for x
    x = 789,436.95/931.58
  6. Step 6: Final answer
    x = 847.41

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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.