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Finding the Fourth Proportional to 4,288.64, 5,918.40 and 2,888.96

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Solution

The fourth proportional to 4,288.64, 5,918.40 and 2,888.96 is: 3,986.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,288.64 : 5,918.40 = 2,888.96 : x
  2. Step 2: Convert to fraction form
    4,288.64/5,918.40 = 2,888.96/x
  3. Step 3: Cross multiply
    4,288.64x = 5,918.40 × 2,888.96
  4. Step 4: Simplify right side
    4,288.64x = 17,098,020.86
  5. Step 5: Solve for x
    x = 17,098,020.86/4,288.64
  6. Step 6: Final answer
    x = 3,986.82

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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.