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Finding the Fourth Proportional to 604,811.70, 907,217.55 and 427,664.70

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Solution

The fourth proportional to 604,811.70, 907,217.55 and 427,664.70 is: 641,497.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,811.70 : 907,217.55 = 427,664.70 : x
  2. Step 2: Convert to fraction form
    604,811.70/907,217.55 = 427,664.70/x
  3. Step 3: Cross multiply
    604,811.70x = 907,217.55 × 427,664.70
  4. Step 4: Simplify right side
    604,811.70x = 387,984,921,355.49
  5. Step 5: Solve for x
    x = 387,984,921,355.49/604,811.70
  6. Step 6: Final answer
    x = 641,497.05

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Similar ratio
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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.