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Finding the Fourth Proportional to 1,605.12, 2,407.46 and 509.49

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Solution

The fourth proportional to 1,605.12, 2,407.46 and 509.49 is: 764.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.12 : 2,407.46 = 509.49 : x
  2. Step 2: Convert to fraction form
    1,605.12/2,407.46 = 509.49/x
  3. Step 3: Cross multiply
    1,605.12x = 2,407.46 × 509.49
  4. Step 4: Simplify right side
    1,605.12x = 1,226,574.25
  5. Step 5: Solve for x
    x = 1,226,574.25/1,605.12
  6. Step 6: Final answer
    x = 764.17

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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.