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Finding the Fourth Proportional to 620,437.73, 856,530.59 and 417,555.20

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Solution

The fourth proportional to 620,437.73, 856,530.59 and 417,555.20 is: 576,445.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,437.73 : 856,530.59 = 417,555.20 : x
  2. Step 2: Convert to fraction form
    620,437.73/856,530.59 = 417,555.20/x
  3. Step 3: Cross multiply
    620,437.73x = 856,530.59 × 417,555.20
  4. Step 4: Simplify right side
    620,437.73x = 357,648,801,867.12
  5. Step 5: Solve for x
    x = 357,648,801,867.12/620,437.73
  6. Step 6: Final answer
    x = 576,445.93

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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.