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Finding the Fourth Proportional to 873,491.72, 1,205,325.78 and 491,511.92

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Solution

The fourth proportional to 873,491.72, 1,205,325.78 and 491,511.92 is: 678,234.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,491.72 : 1,205,325.78 = 491,511.92 : x
  2. Step 2: Convert to fraction form
    873,491.72/1,205,325.78 = 491,511.92/x
  3. Step 3: Cross multiply
    873,491.72x = 1,205,325.78 × 491,511.92
  4. Step 4: Simplify right side
    873,491.72x = 592,431,988,353.30
  5. Step 5: Solve for x
    x = 592,431,988,353.30/873,491.72
  6. Step 6: Final answer
    x = 678,234.23

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1.5x scale

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.