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Finding the Fourth Proportional to 351,400.80, 485,750.28 and 313,535.64

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Solution

The fourth proportional to 351,400.80, 485,750.28 and 313,535.64 is: 433,408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,400.80 : 485,750.28 = 313,535.64 : x
  2. Step 2: Convert to fraction form
    351,400.80/485,750.28 = 313,535.64/x
  3. Step 3: Cross multiply
    351,400.80x = 485,750.28 × 313,535.64
  4. Step 4: Simplify right side
    351,400.80x = 152,300,024,919.98
  5. Step 5: Solve for x
    x = 152,300,024,919.98/351,400.80
  6. Step 6: Final answer
    x = 433,408.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.