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Finding the Fourth Proportional to 1,159.71, 1,735.80 and 851.50

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Solution

The fourth proportional to 1,159.71, 1,735.80 and 851.50 is: 1,274.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.71 : 1,735.80 = 851.50 : x
  2. Step 2: Convert to fraction form
    1,159.71/1,735.80 = 851.50/x
  3. Step 3: Cross multiply
    1,159.71x = 1,735.80 × 851.50
  4. Step 4: Simplify right side
    1,159.71x = 1,478,025.02
  5. Step 5: Solve for x
    x = 1,478,025.02/1,159.71
  6. Step 6: Final answer
    x = 1,274.48

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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.