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Finding the Fourth Proportional to 873,672.78, 1,205,707.23 and 491,724.30

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Solution

The fourth proportional to 873,672.78, 1,205,707.23 and 491,724.30 is: 678,601.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,672.78 : 1,205,707.23 = 491,724.30 : x
  2. Step 2: Convert to fraction form
    873,672.78/1,205,707.23 = 491,724.30/x
  3. Step 3: Cross multiply
    873,672.78x = 1,205,707.23 × 491,724.30
  4. Step 4: Simplify right side
    873,672.78x = 592,875,543,676.69
  5. Step 5: Solve for x
    x = 592,875,543,676.69/873,672.78
  6. Step 6: Final answer
    x = 678,601.37

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Double scale
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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.