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Finding the Fourth Proportional to 873,530.92, 1,205,374.98 and 491,689

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Solution

The fourth proportional to 873,530.92, 1,205,374.98 and 491,689 is: 678,475.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,530.92 : 1,205,374.98 = 491,689 : x
  2. Step 2: Convert to fraction form
    873,530.92/1,205,374.98 = 491,689/x
  3. Step 3: Cross multiply
    873,530.92x = 1,205,374.98 × 491,689
  4. Step 4: Simplify right side
    873,530.92x = 592,669,618,541.22
  5. Step 5: Solve for x
    x = 592,669,618,541.22/873,530.92
  6. Step 6: Final answer
    x = 678,475.83

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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.