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Finding the Fourth Proportional to 572,336.40, 858,115.80 and 217,297.20

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Solution

The fourth proportional to 572,336.40, 858,115.80 and 217,297.20 is: 325,798.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,336.40 : 858,115.80 = 217,297.20 : x
  2. Step 2: Convert to fraction form
    572,336.40/858,115.80 = 217,297.20/x
  3. Step 3: Cross multiply
    572,336.40x = 858,115.80 × 217,297.20
  4. Step 4: Simplify right side
    572,336.40x = 186,466,160,615.76
  5. Step 5: Solve for x
    x = 186,466,160,615.76/572,336.40
  6. Step 6: Final answer
    x = 325,798.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.