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Finding the Fourth Proportional to 717,770.75, 990,311.15 and 427,149.34

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Solution

The fourth proportional to 717,770.75, 990,311.15 and 427,149.34 is: 589,339.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,770.75 : 990,311.15 = 427,149.34 : x
  2. Step 2: Convert to fraction form
    717,770.75/990,311.15 = 427,149.34/x
  3. Step 3: Cross multiply
    717,770.75x = 990,311.15 × 427,149.34
  4. Step 4: Simplify right side
    717,770.75x = 423,010,747,029.84
  5. Step 5: Solve for x
    x = 423,010,747,029.84/717,770.75
  6. Step 6: Final answer
    x = 589,339.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.