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Finding the Fourth Proportional to 516,526.91, 712,803.35 and 290,172.41

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Solution

The fourth proportional to 516,526.91, 712,803.35 and 290,172.41 is: 400,435.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,526.91 : 712,803.35 = 290,172.41 : x
  2. Step 2: Convert to fraction form
    516,526.91/712,803.35 = 290,172.41/x
  3. Step 3: Cross multiply
    516,526.91x = 712,803.35 × 290,172.41
  4. Step 4: Simplify right side
    516,526.91x = 206,835,864,474.71
  5. Step 5: Solve for x
    x = 206,835,864,474.71/516,526.91
  6. Step 6: Final answer
    x = 400,435.80

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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.