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Finding the Fourth Proportional to 713,667.38, 984,770.46 and 391,292.64

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Solution

The fourth proportional to 713,667.38, 984,770.46 and 391,292.64 is: 539,934.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,667.38 : 984,770.46 = 391,292.64 : x
  2. Step 2: Convert to fraction form
    713,667.38/984,770.46 = 391,292.64/x
  3. Step 3: Cross multiply
    713,667.38x = 984,770.46 × 391,292.64
  4. Step 4: Simplify right side
    713,667.38x = 385,333,433,087.41
  5. Step 5: Solve for x
    x = 385,333,433,087.41/713,667.38
  6. Step 6: Final answer
    x = 539,934.21

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Double scale
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Similar ratio
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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.