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Finding the Fourth Proportional to 879,392.88, 1,318,197.78 and 347,288.76

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Solution

The fourth proportional to 879,392.88, 1,318,197.78 and 347,288.76 is: 520,581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,392.88 : 1,318,197.78 = 347,288.76 : x
  2. Step 2: Convert to fraction form
    879,392.88/1,318,197.78 = 347,288.76/x
  3. Step 3: Cross multiply
    879,392.88x = 1,318,197.78 × 347,288.76
  4. Step 4: Simplify right side
    879,392.88x = 457,795,272,450.95
  5. Step 5: Solve for x
    x = 457,795,272,450.95/879,392.88
  6. Step 6: Final answer
    x = 520,581.05

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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.