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Finding the Fourth Proportional to 318,303.09, 477,454.74 and 81,645.78

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Solution

The fourth proportional to 318,303.09, 477,454.74 and 81,645.78 is: 122,468.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,303.09 : 477,454.74 = 81,645.78 : x
  2. Step 2: Convert to fraction form
    318,303.09/477,454.74 = 81,645.78/x
  3. Step 3: Cross multiply
    318,303.09x = 477,454.74 × 81,645.78
  4. Step 4: Simplify right side
    318,303.09x = 38,982,164,662.00
  5. Step 5: Solve for x
    x = 38,982,164,662.00/318,303.09
  6. Step 6: Final answer
    x = 122,468.70

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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.