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Finding the Fourth Proportional to 708,258.62, 1,062,386.22 and 221,978

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Solution

The fourth proportional to 708,258.62, 1,062,386.22 and 221,978 is: 332,966.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,258.62 : 1,062,386.22 = 221,978 : x
  2. Step 2: Convert to fraction form
    708,258.62/1,062,386.22 = 221,978/x
  3. Step 3: Cross multiply
    708,258.62x = 1,062,386.22 × 221,978
  4. Step 4: Simplify right side
    708,258.62x = 235,826,368,343.16
  5. Step 5: Solve for x
    x = 235,826,368,343.16/708,258.62
  6. Step 6: Final answer
    x = 332,966.46

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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.