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Finding the Fourth Proportional to 873.17, 1,205.76 and 651.74

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Solution

The fourth proportional to 873.17, 1,205.76 and 651.74 is: 899.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.17 : 1,205.76 = 651.74 : x
  2. Step 2: Convert to fraction form
    873.17/1,205.76 = 651.74/x
  3. Step 3: Cross multiply
    873.17x = 1,205.76 × 651.74
  4. Step 4: Simplify right side
    873.17x = 785,842.02
  5. Step 5: Solve for x
    x = 785,842.02/873.17
  6. Step 6: Final answer
    x = 899.99

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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.