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Finding the Fourth Proportional to 716,139.72, 988,253.10 and 393,849.84

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Solution

The fourth proportional to 716,139.72, 988,253.10 and 393,849.84 is: 543,501.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,139.72 : 988,253.10 = 393,849.84 : x
  2. Step 2: Convert to fraction form
    716,139.72/988,253.10 = 393,849.84/x
  3. Step 3: Cross multiply
    716,139.72x = 988,253.10 × 393,849.84
  4. Step 4: Simplify right side
    716,139.72x = 389,223,325,314.50
  5. Step 5: Solve for x
    x = 389,223,325,314.50/716,139.72
  6. Step 6: Final answer
    x = 543,501.94

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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.