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Finding the Fourth Proportional to 519,516.05, 716,976.47 and 290,117.66

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Solution

The fourth proportional to 519,516.05, 716,976.47 and 290,117.66 is: 400,387.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,516.05 : 716,976.47 = 290,117.66 : x
  2. Step 2: Convert to fraction form
    519,516.05/716,976.47 = 290,117.66/x
  3. Step 3: Cross multiply
    519,516.05x = 716,976.47 × 290,117.66
  4. Step 4: Simplify right side
    519,516.05x = 208,007,535,316.35
  5. Step 5: Solve for x
    x = 208,007,535,316.35/519,516.05
  6. Step 6: Final answer
    x = 400,387.12

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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.