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Finding the Fourth Proportional to 2,397.76, 3,596.64 and 666.40

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Solution

The fourth proportional to 2,397.76, 3,596.64 and 666.40 is: 999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,397.76 : 3,596.64 = 666.40 : x
  2. Step 2: Convert to fraction form
    2,397.76/3,596.64 = 666.40/x
  3. Step 3: Cross multiply
    2,397.76x = 3,596.64 × 666.40
  4. Step 4: Simplify right side
    2,397.76x = 2,396,800.90
  5. Step 5: Solve for x
    x = 2,396,800.90/2,397.76
  6. Step 6: Final answer
    x = 999.60

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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.