Home / 716,239.75-988,411.35-393,974.36

Finding the Fourth Proportional to 716,239.75, 988,411.35 and 393,974.36

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Solution

The fourth proportional to 716,239.75, 988,411.35 and 393,974.36 is: 543,684.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,239.75 : 988,411.35 = 393,974.36 : x
  2. Step 2: Convert to fraction form
    716,239.75/988,411.35 = 393,974.36/x
  3. Step 3: Cross multiply
    716,239.75x = 988,411.35 × 393,974.36
  4. Step 4: Simplify right side
    716,239.75x = 389,408,729,032.99
  5. Step 5: Solve for x
    x = 389,408,729,032.99/716,239.75
  6. Step 6: Final answer
    x = 543,684.89

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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.