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Finding the Fourth Proportional to 716,289.24, 988,491.70 and 394,012.92

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Solution

The fourth proportional to 716,289.24, 988,491.70 and 394,012.92 is: 543,744.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,289.24 : 988,491.70 = 394,012.92 : x
  2. Step 2: Convert to fraction form
    716,289.24/988,491.70 = 394,012.92/x
  3. Step 3: Cross multiply
    716,289.24x = 988,491.70 × 394,012.92
  4. Step 4: Simplify right side
    716,289.24x = 389,478,501,112.76
  5. Step 5: Solve for x
    x = 389,478,501,112.76/716,289.24
  6. Step 6: Final answer
    x = 543,744.73

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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.