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Finding the Fourth Proportional to 932.02, 1,403.55 and 811.73

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Solution

The fourth proportional to 932.02, 1,403.55 and 811.73 is: 1,222.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.02 : 1,403.55 = 811.73 : x
  2. Step 2: Convert to fraction form
    932.02/1,403.55 = 811.73/x
  3. Step 3: Cross multiply
    932.02x = 1,403.55 × 811.73
  4. Step 4: Simplify right side
    932.02x = 1,139,303.64
  5. Step 5: Solve for x
    x = 1,139,303.64/932.02
  6. Step 6: Final answer
    x = 1,222.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.