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Finding the Fourth Proportional to 713,488.74, 984,606.96 and 391,198.04

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Solution

The fourth proportional to 713,488.74, 984,606.96 and 391,198.04 is: 539,849.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,488.74 : 984,606.96 = 391,198.04 : x
  2. Step 2: Convert to fraction form
    713,488.74/984,606.96 = 391,198.04/x
  3. Step 3: Cross multiply
    713,488.74x = 984,606.96 × 391,198.04
  4. Step 4: Simplify right side
    713,488.74x = 385,176,312,922.36
  5. Step 5: Solve for x
    x = 385,176,312,922.36/713,488.74
  6. Step 6: Final answer
    x = 539,849.18

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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.