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Finding the Fourth Proportional to 689,526, 1,034,638.92 and 315,642.96

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Solution

The fourth proportional to 689,526, 1,034,638.92 and 315,642.96 is: 473,624.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,526 : 1,034,638.92 = 315,642.96 : x
  2. Step 2: Convert to fraction form
    689,526/1,034,638.92 = 315,642.96/x
  3. Step 3: Cross multiply
    689,526x = 1,034,638.92 × 315,642.96
  4. Step 4: Simplify right side
    689,526x = 326,576,491,240.00
  5. Step 5: Solve for x
    x = 326,576,491,240.00/689,526
  6. Step 6: Final answer
    x = 473,624.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.