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Finding the Fourth Proportional to 718,250.49, 991,160.16 and 391,556.75

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Solution

The fourth proportional to 718,250.49, 991,160.16 and 391,556.75 is: 540,334.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,250.49 : 991,160.16 = 391,556.75 : x
  2. Step 2: Convert to fraction form
    718,250.49/991,160.16 = 391,556.75/x
  3. Step 3: Cross multiply
    718,250.49x = 991,160.16 × 391,556.75
  4. Step 4: Simplify right side
    718,250.49x = 388,095,446,023.28
  5. Step 5: Solve for x
    x = 388,095,446,023.28/718,250.49
  6. Step 6: Final answer
    x = 540,334.40

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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.