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Finding the Fourth Proportional to 713,617.69, 984,805.92 and 391,308.56

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Solution

The fourth proportional to 713,617.69, 984,805.92 and 391,308.56 is: 540,013.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,617.69 : 984,805.92 = 391,308.56 : x
  2. Step 2: Convert to fraction form
    713,617.69/984,805.92 = 391,308.56/x
  3. Step 3: Cross multiply
    713,617.69x = 984,805.92 × 391,308.56
  4. Step 4: Simplify right side
    713,617.69x = 385,362,986,434.68
  5. Step 5: Solve for x
    x = 385,362,986,434.68/713,617.69
  6. Step 6: Final answer
    x = 540,013.22

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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.