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Finding the Fourth Proportional to 664,385.20, 997,015.20 and 380,075.20

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Solution

The fourth proportional to 664,385.20, 997,015.20 and 380,075.20 is: 570,363.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,385.20 : 997,015.20 = 380,075.20 : x
  2. Step 2: Convert to fraction form
    664,385.20/997,015.20 = 380,075.20/x
  3. Step 3: Cross multiply
    664,385.20x = 997,015.20 × 380,075.20
  4. Step 4: Simplify right side
    664,385.20x = 378,940,751,543.04
  5. Step 5: Solve for x
    x = 378,940,751,543.04/664,385.20
  6. Step 6: Final answer
    x = 570,363.02

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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.