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Finding the Fourth Proportional to 1,445.42, 2,168.10 and 579.50

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Solution

The fourth proportional to 1,445.42, 2,168.10 and 579.50 is: 869.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.42 : 2,168.10 = 579.50 : x
  2. Step 2: Convert to fraction form
    1,445.42/2,168.10 = 579.50/x
  3. Step 3: Cross multiply
    1,445.42x = 2,168.10 × 579.50
  4. Step 4: Simplify right side
    1,445.42x = 1,256,413.95
  5. Step 5: Solve for x
    x = 1,256,413.95/1,445.42
  6. Step 6: Final answer
    x = 869.24

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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.