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Finding the Fourth Proportional to 716,378.76, 988,571.51 and 394,068.42

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Solution

The fourth proportional to 716,378.76, 988,571.51 and 394,068.42 is: 543,797.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,378.76 : 988,571.51 = 394,068.42 : x
  2. Step 2: Convert to fraction form
    716,378.76/988,571.51 = 394,068.42/x
  3. Step 3: Cross multiply
    716,378.76x = 988,571.51 × 394,068.42
  4. Step 4: Simplify right side
    716,378.76x = 389,564,811,032.37
  5. Step 5: Solve for x
    x = 389,564,811,032.37/716,378.76
  6. Step 6: Final answer
    x = 543,797.27

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Double scale
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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.