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Finding the Fourth Proportional to 520,473.30, 779,543.55 and 427,161.30

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Solution

The fourth proportional to 520,473.30, 779,543.55 and 427,161.30 is: 639,784.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,473.30 : 779,543.55 = 427,161.30 : x
  2. Step 2: Convert to fraction form
    520,473.30/779,543.55 = 427,161.30/x
  3. Step 3: Cross multiply
    520,473.30x = 779,543.55 × 427,161.30
  4. Step 4: Simplify right side
    520,473.30x = 332,990,836,224.62
  5. Step 5: Solve for x
    x = 332,990,836,224.62/520,473.30
  6. Step 6: Final answer
    x = 639,784.67

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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.