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Finding the Fourth Proportional to 713,638.65, 984,834.87 and 391,329.53

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Solution

The fourth proportional to 713,638.65, 984,834.87 and 391,329.53 is: 540,042.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,638.65 : 984,834.87 = 391,329.53 : x
  2. Step 2: Convert to fraction form
    713,638.65/984,834.87 = 391,329.53/x
  3. Step 3: Cross multiply
    713,638.65x = 984,834.87 × 391,329.53
  4. Step 4: Simplify right side
    713,638.65x = 385,394,966,804.71
  5. Step 5: Solve for x
    x = 385,394,966,804.71/713,638.65
  6. Step 6: Final answer
    x = 540,042.17

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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.