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Finding the Fourth Proportional to 1,435.35, 2,151.27 and 611.88

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Solution

The fourth proportional to 1,435.35, 2,151.27 and 611.88 is: 917.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.35 : 2,151.27 = 611.88 : x
  2. Step 2: Convert to fraction form
    1,435.35/2,151.27 = 611.88/x
  3. Step 3: Cross multiply
    1,435.35x = 2,151.27 × 611.88
  4. Step 4: Simplify right side
    1,435.35x = 1,316,316.03
  5. Step 5: Solve for x
    x = 1,316,316.03/1,435.35
  6. Step 6: Final answer
    x = 917.07

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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.