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Finding the Fourth Proportional to 440,677.42, 659,990.90 and 428,555.50

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Solution

The fourth proportional to 440,677.42, 659,990.90 and 428,555.50 is: 641,836.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,677.42 : 659,990.90 = 428,555.50 : x
  2. Step 2: Convert to fraction form
    440,677.42/659,990.90 = 428,555.50/x
  3. Step 3: Cross multiply
    440,677.42x = 659,990.90 × 428,555.50
  4. Step 4: Simplify right side
    440,677.42x = 282,842,730,144.95
  5. Step 5: Solve for x
    x = 282,842,730,144.95/440,677.42
  6. Step 6: Final answer
    x = 641,836.22

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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.