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Finding the Fourth Proportional to 642,246.80, 963,143.40 and 221,424.80

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Solution

The fourth proportional to 642,246.80, 963,143.40 and 221,424.80 is: 332,059.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,246.80 : 963,143.40 = 221,424.80 : x
  2. Step 2: Convert to fraction form
    642,246.80/963,143.40 = 221,424.80/x
  3. Step 3: Cross multiply
    642,246.80x = 963,143.40 × 221,424.80
  4. Step 4: Simplify right side
    642,246.80x = 213,263,834,716.32
  5. Step 5: Solve for x
    x = 213,263,834,716.32/642,246.80
  6. Step 6: Final answer
    x = 332,059.01

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1.5x scale

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.