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Finding the Fourth Proportional to 1,475.08, 2,035.53 and 811.91

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Solution

The fourth proportional to 1,475.08, 2,035.53 and 811.91 is: 1,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.08 : 2,035.53 = 811.91 : x
  2. Step 2: Convert to fraction form
    1,475.08/2,035.53 = 811.91/x
  3. Step 3: Cross multiply
    1,475.08x = 2,035.53 × 811.91
  4. Step 4: Simplify right side
    1,475.08x = 1,652,667.16
  5. Step 5: Solve for x
    x = 1,652,667.16/1,475.08
  6. Step 6: Final answer
    x = 1,120.40

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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.