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Finding the Fourth Proportional to 1,201.30, 1,657.76 and 670.18

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Solution

The fourth proportional to 1,201.30, 1,657.76 and 670.18 is: 924.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.30 : 1,657.76 = 670.18 : x
  2. Step 2: Convert to fraction form
    1,201.30/1,657.76 = 670.18/x
  3. Step 3: Cross multiply
    1,201.30x = 1,657.76 × 670.18
  4. Step 4: Simplify right side
    1,201.30x = 1,110,997.60
  5. Step 5: Solve for x
    x = 1,110,997.60/1,201.30
  6. Step 6: Final answer
    x = 924.83

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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.