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Finding the Fourth Proportional to 713,578.70, 984,738.12 and 391,294.28

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Solution

The fourth proportional to 713,578.70, 984,738.12 and 391,294.28 is: 539,985.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,578.70 : 984,738.12 = 391,294.28 : x
  2. Step 2: Convert to fraction form
    713,578.70/984,738.12 = 391,294.28/x
  3. Step 3: Cross multiply
    713,578.70x = 984,738.12 × 391,294.28
  4. Step 4: Simplify right side
    713,578.70x = 385,322,393,653.95
  5. Step 5: Solve for x
    x = 385,322,393,653.95/713,578.70
  6. Step 6: Final answer
    x = 539,985.84

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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.