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Finding the Fourth Proportional to 512,948.70, 768,501.45 and 439,220.70

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Solution

The fourth proportional to 512,948.70, 768,501.45 and 439,220.70 is: 658,041.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,948.70 : 768,501.45 = 439,220.70 : x
  2. Step 2: Convert to fraction form
    512,948.70/768,501.45 = 439,220.70/x
  3. Step 3: Cross multiply
    512,948.70x = 768,501.45 × 439,220.70
  4. Step 4: Simplify right side
    512,948.70x = 337,541,744,820.02
  5. Step 5: Solve for x
    x = 337,541,744,820.02/512,948.70
  6. Step 6: Final answer
    x = 658,041.91

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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.