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Finding the Fourth Proportional to 873.39, 1,316.10 and 722.72

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Solution

The fourth proportional to 873.39, 1,316.10 and 722.72 is: 1,089.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.39 : 1,316.10 = 722.72 : x
  2. Step 2: Convert to fraction form
    873.39/1,316.10 = 722.72/x
  3. Step 3: Cross multiply
    873.39x = 1,316.10 × 722.72
  4. Step 4: Simplify right side
    873.39x = 951,165.21
  5. Step 5: Solve for x
    x = 951,165.21/873.39
  6. Step 6: Final answer
    x = 1,089.05

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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.