Home / 415,910.20-623,865.30-389,666.20

Finding the Fourth Proportional to 415,910.20, 623,865.30 and 389,666.20

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Solution

The fourth proportional to 415,910.20, 623,865.30 and 389,666.20 is: 584,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,910.20 : 623,865.30 = 389,666.20 : x
  2. Step 2: Convert to fraction form
    415,910.20/623,865.30 = 389,666.20/x
  3. Step 3: Cross multiply
    415,910.20x = 623,865.30 × 389,666.20
  4. Step 4: Simplify right side
    415,910.20x = 243,099,220,762.86
  5. Step 5: Solve for x
    x = 243,099,220,762.86/415,910.20
  6. Step 6: Final answer
    x = 584,499.30

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Double scale
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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.