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Finding the Fourth Proportional to 620,866.44, 856,117.62 and 419,312.52

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Solution

The fourth proportional to 620,866.44, 856,117.62 and 419,312.52 is: 578,193.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,866.44 : 856,117.62 = 419,312.52 : x
  2. Step 2: Convert to fraction form
    620,866.44/856,117.62 = 419,312.52/x
  3. Step 3: Cross multiply
    620,866.44x = 856,117.62 × 419,312.52
  4. Step 4: Simplify right side
    620,866.44x = 358,980,836,658.60
  5. Step 5: Solve for x
    x = 358,980,836,658.60/620,866.44
  6. Step 6: Final answer
    x = 578,193.33

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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.