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Finding the Fourth Proportional to 1,076.64, 1,615.20 and 346.32

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Solution

The fourth proportional to 1,076.64, 1,615.20 and 346.32 is: 519.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.64 : 1,615.20 = 346.32 : x
  2. Step 2: Convert to fraction form
    1,076.64/1,615.20 = 346.32/x
  3. Step 3: Cross multiply
    1,076.64x = 1,615.20 × 346.32
  4. Step 4: Simplify right side
    1,076.64x = 559,376.06
  5. Step 5: Solve for x
    x = 559,376.06/1,076.64
  6. Step 6: Final answer
    x = 519.56

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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.