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Finding the Fourth Proportional to 687,270, 948,847.32 and 449,220.72

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Solution

The fourth proportional to 687,270, 948,847.32 and 449,220.72 is: 620,195.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,270 : 948,847.32 = 449,220.72 : x
  2. Step 2: Convert to fraction form
    687,270/948,847.32 = 449,220.72/x
  3. Step 3: Cross multiply
    687,270x = 948,847.32 × 449,220.72
  4. Step 4: Simplify right side
    687,270x = 426,241,876,260.47
  5. Step 5: Solve for x
    x = 426,241,876,260.47/687,270
  6. Step 6: Final answer
    x = 620,195.67

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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.