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Finding the Fourth Proportional to 716,091.78, 988,186.95 and 393,801.88

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Solution

The fourth proportional to 716,091.78, 988,186.95 and 393,801.88 is: 543,435.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,091.78 : 988,186.95 = 393,801.88 : x
  2. Step 2: Convert to fraction form
    716,091.78/988,186.95 = 393,801.88/x
  3. Step 3: Cross multiply
    716,091.78x = 988,186.95 × 393,801.88
  4. Step 4: Simplify right side
    716,091.78x = 389,149,878,985.02
  5. Step 5: Solve for x
    x = 389,149,878,985.02/716,091.78
  6. Step 6: Final answer
    x = 543,435.76

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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.