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Finding the Fourth Proportional to 1,604.88, 2,407.60 and 509.28

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Solution

The fourth proportional to 1,604.88, 2,407.60 and 509.28 is: 764.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,604.88 : 2,407.60 = 509.28 : x
  2. Step 2: Convert to fraction form
    1,604.88/2,407.60 = 509.28/x
  3. Step 3: Cross multiply
    1,604.88x = 2,407.60 × 509.28
  4. Step 4: Simplify right side
    1,604.88x = 1,226,142.53
  5. Step 5: Solve for x
    x = 1,226,142.53/1,604.88
  6. Step 6: Final answer
    x = 764.01

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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.