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Finding the Fourth Proportional to 515,600.40, 773,400.60 and 486,075.90

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Solution

The fourth proportional to 515,600.40, 773,400.60 and 486,075.90 is: 729,113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,600.40 : 773,400.60 = 486,075.90 : x
  2. Step 2: Convert to fraction form
    515,600.40/773,400.60 = 486,075.90/x
  3. Step 3: Cross multiply
    515,600.40x = 773,400.60 × 486,075.90
  4. Step 4: Simplify right side
    515,600.40x = 375,931,392,705.54
  5. Step 5: Solve for x
    x = 375,931,392,705.54/515,600.40
  6. Step 6: Final answer
    x = 729,113.85

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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.