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Finding the Fourth Proportional to 1,605.16, 2,215.14 and 906.52

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Solution

The fourth proportional to 1,605.16, 2,215.14 and 906.52 is: 1,251.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.16 : 2,215.14 = 906.52 : x
  2. Step 2: Convert to fraction form
    1,605.16/2,215.14 = 906.52/x
  3. Step 3: Cross multiply
    1,605.16x = 2,215.14 × 906.52
  4. Step 4: Simplify right side
    1,605.16x = 2,008,068.71
  5. Step 5: Solve for x
    x = 2,008,068.71/1,605.16
  6. Step 6: Final answer
    x = 1,251.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.