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Finding the Fourth Proportional to 2,309.61, 3,465 and 666.28

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Solution

The fourth proportional to 2,309.61, 3,465 and 666.28 is: 999.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.61 : 3,465 = 666.28 : x
  2. Step 2: Convert to fraction form
    2,309.61/3,465 = 666.28/x
  3. Step 3: Cross multiply
    2,309.61x = 3,465 × 666.28
  4. Step 4: Simplify right side
    2,309.61x = 2,308,660.20
  5. Step 5: Solve for x
    x = 2,308,660.20/2,309.61
  6. Step 6: Final answer
    x = 999.59

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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.