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Finding the Fourth Proportional to 716,108.65, 988,203.71 and 393,815.93

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Solution

The fourth proportional to 716,108.65, 988,203.71 and 393,815.93 is: 543,451.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,108.65 : 988,203.71 = 393,815.93 : x
  2. Step 2: Convert to fraction form
    716,108.65/988,203.71 = 393,815.93/x
  3. Step 3: Cross multiply
    716,108.65x = 988,203.71 × 393,815.93
  4. Step 4: Simplify right side
    716,108.65x = 389,170,359,126.62
  5. Step 5: Solve for x
    x = 389,170,359,126.62/716,108.65
  6. Step 6: Final answer
    x = 543,451.56

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Double scale
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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.