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Finding the Fourth Proportional to 642,608.60, 963,740.10 and 268,554.20

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Solution

The fourth proportional to 642,608.60, 963,740.10 and 268,554.20 is: 402,759.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,608.60 : 963,740.10 = 268,554.20 : x
  2. Step 2: Convert to fraction form
    642,608.60/963,740.10 = 268,554.20/x
  3. Step 3: Cross multiply
    642,608.60x = 963,740.10 × 268,554.20
  4. Step 4: Simplify right side
    642,608.60x = 258,816,451,563.42
  5. Step 5: Solve for x
    x = 258,816,451,563.42/642,608.60
  6. Step 6: Final answer
    x = 402,759.08

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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.