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Finding the Fourth Proportional to 287,684.66, 397,174.93 and 255,765.20

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Solution

The fourth proportional to 287,684.66, 397,174.93 and 255,765.20 is: 353,107.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,684.66 : 397,174.93 = 255,765.20 : x
  2. Step 2: Convert to fraction form
    287,684.66/397,174.93 = 255,765.20/x
  3. Step 3: Cross multiply
    287,684.66x = 397,174.93 × 255,765.20
  4. Step 4: Simplify right side
    287,684.66x = 101,583,522,781.15
  5. Step 5: Solve for x
    x = 101,583,522,781.15/287,684.66
  6. Step 6: Final answer
    x = 353,107.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.