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Finding the Fourth Proportional to 1,475.03, 2,035.45 and 811.88

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Solution

The fourth proportional to 1,475.03, 2,035.45 and 811.88 is: 1,120.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.03 : 2,035.45 = 811.88 : x
  2. Step 2: Convert to fraction form
    1,475.03/2,035.45 = 811.88/x
  3. Step 3: Cross multiply
    1,475.03x = 2,035.45 × 811.88
  4. Step 4: Simplify right side
    1,475.03x = 1,652,541.41
  5. Step 5: Solve for x
    x = 1,652,541.41/1,475.03
  6. Step 6: Final answer
    x = 1,120.35

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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.