Home / 716,105.61-988,206.02-393,815.67

Finding the Fourth Proportional to 716,105.61, 988,206.02 and 393,815.67

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Solution

The fourth proportional to 716,105.61, 988,206.02 and 393,815.67 is: 543,454.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,105.61 : 988,206.02 = 393,815.67 : x
  2. Step 2: Convert to fraction form
    716,105.61/988,206.02 = 393,815.67/x
  3. Step 3: Cross multiply
    716,105.61x = 988,206.02 × 393,815.67
  4. Step 4: Simplify right side
    716,105.61x = 389,171,019,440.16
  5. Step 5: Solve for x
    x = 389,171,019,440.16/716,105.61
  6. Step 6: Final answer
    x = 543,454.78

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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.