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Finding the Fourth Proportional to 1,561.53, 2,341.71 and 636.59

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Solution

The fourth proportional to 1,561.53, 2,341.71 and 636.59 is: 954.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.53 : 2,341.71 = 636.59 : x
  2. Step 2: Convert to fraction form
    1,561.53/2,341.71 = 636.59/x
  3. Step 3: Cross multiply
    1,561.53x = 2,341.71 × 636.59
  4. Step 4: Simplify right side
    1,561.53x = 1,490,697.46
  5. Step 5: Solve for x
    x = 1,490,697.46/1,561.53
  6. Step 6: Final answer
    x = 954.64

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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.