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Finding the Fourth Proportional to 712,313,318.60, 982,992,472.86 and 394,794,064.13

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Solution

The fourth proportional to 712,313,318.60, 982,992,472.86 and 394,794,064.13 is: 544,815,860.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,313,318.60 : 982,992,472.86 = 394,794,064.13 : x
  2. Step 2: Convert to fraction form
    712,313,318.60/982,992,472.86 = 394,794,064.13/x
  3. Step 3: Cross multiply
    712,313,318.60x = 982,992,472.86 × 394,794,064.13
  4. Step 4: Simplify right side
    712,313,318.60x = 388,079,593,364,683,136
  5. Step 5: Solve for x
    x = 388,079,593,364,683,136/712,313,318.60
  6. Step 6: Final answer
    x = 544,815,860.15

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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.