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Finding the Fourth Proportional to 318,639.15, 477,848.57 and 141,270.21

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Solution

The fourth proportional to 318,639.15, 477,848.57 and 141,270.21 is: 211,856.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,639.15 : 477,848.57 = 141,270.21 : x
  2. Step 2: Convert to fraction form
    318,639.15/477,848.57 = 141,270.21/x
  3. Step 3: Cross multiply
    318,639.15x = 477,848.57 × 141,270.21
  4. Step 4: Simplify right side
    318,639.15x = 67,505,767,125.75
  5. Step 5: Solve for x
    x = 67,505,767,125.75/318,639.15
  6. Step 6: Final answer
    x = 211,856.48

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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.