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Finding the Fourth Proportional to 353,913.70, 530,870.55 and 221,203.30

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Solution

The fourth proportional to 353,913.70, 530,870.55 and 221,203.30 is: 331,804.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,913.70 : 530,870.55 = 221,203.30 : x
  2. Step 2: Convert to fraction form
    353,913.70/530,870.55 = 221,203.30/x
  3. Step 3: Cross multiply
    353,913.70x = 530,870.55 × 221,203.30
  4. Step 4: Simplify right side
    353,913.70x = 117,430,317,532.82
  5. Step 5: Solve for x
    x = 117,430,317,532.82/353,913.70
  6. Step 6: Final answer
    x = 331,804.95

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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.