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Finding the Fourth Proportional to 1,555.71, 2,332.85 and 906.63

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Solution

The fourth proportional to 1,555.71, 2,332.85 and 906.63 is: 1,359.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.71 : 2,332.85 = 906.63 : x
  2. Step 2: Convert to fraction form
    1,555.71/2,332.85 = 906.63/x
  3. Step 3: Cross multiply
    1,555.71x = 2,332.85 × 906.63
  4. Step 4: Simplify right side
    1,555.71x = 2,115,027.26
  5. Step 5: Solve for x
    x = 2,115,027.26/1,555.71
  6. Step 6: Final answer
    x = 1,359.53

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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.