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Finding the Fourth Proportional to 912.88, 1,368.37 and 584.05

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Solution

The fourth proportional to 912.88, 1,368.37 and 584.05 is: 875.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.88 : 1,368.37 = 584.05 : x
  2. Step 2: Convert to fraction form
    912.88/1,368.37 = 584.05/x
  3. Step 3: Cross multiply
    912.88x = 1,368.37 × 584.05
  4. Step 4: Simplify right side
    912.88x = 799,196.50
  5. Step 5: Solve for x
    x = 799,196.50/912.88
  6. Step 6: Final answer
    x = 875.47

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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.