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Finding the Fourth Proportional to 716,095.28, 988,191.78 and 393,805.39

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Solution

The fourth proportional to 716,095.28, 988,191.78 and 393,805.39 is: 543,440.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,095.28 : 988,191.78 = 393,805.39 : x
  2. Step 2: Convert to fraction form
    716,095.28/988,191.78 = 393,805.39/x
  3. Step 3: Cross multiply
    716,095.28x = 988,191.78 × 393,805.39
  4. Step 4: Simplify right side
    716,095.28x = 389,155,249,317.69
  5. Step 5: Solve for x
    x = 389,155,249,317.69/716,095.28
  6. Step 6: Final answer
    x = 543,440.60

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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.