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Finding the Fourth Proportional to 642,752.16, 963,817.20 and 221,880.48

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Solution

The fourth proportional to 642,752.16, 963,817.20 and 221,880.48 is: 332,713.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,752.16 : 963,817.20 = 221,880.48 : x
  2. Step 2: Convert to fraction form
    642,752.16/963,817.20 = 221,880.48/x
  3. Step 3: Cross multiply
    642,752.16x = 963,817.20 × 221,880.48
  4. Step 4: Simplify right side
    642,752.16x = 213,852,222,968.26
  5. Step 5: Solve for x
    x = 213,852,222,968.26/642,752.16
  6. Step 6: Final answer
    x = 332,713.35

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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.