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Finding the Fourth Proportional to 1,720.76, 2,374.60 and 934.81

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Solution

The fourth proportional to 1,720.76, 2,374.60 and 934.81 is: 1,290.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.76 : 2,374.60 = 934.81 : x
  2. Step 2: Convert to fraction form
    1,720.76/2,374.60 = 934.81/x
  3. Step 3: Cross multiply
    1,720.76x = 2,374.60 × 934.81
  4. Step 4: Simplify right side
    1,720.76x = 2,219,791.55
  5. Step 5: Solve for x
    x = 2,219,791.55/1,720.76
  6. Step 6: Final answer
    x = 1,290.00

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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.