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Finding the Fourth Proportional to 354,866.35, 488,472.57 and 309,464.23

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Solution

The fourth proportional to 354,866.35, 488,472.57 and 309,464.23 is: 425,976.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,866.35 : 488,472.57 = 309,464.23 : x
  2. Step 2: Convert to fraction form
    354,866.35/488,472.57 = 309,464.23/x
  3. Step 3: Cross multiply
    354,866.35x = 488,472.57 × 309,464.23
  4. Step 4: Simplify right side
    354,866.35x = 151,164,787,751.17
  5. Step 5: Solve for x
    x = 151,164,787,751.17/354,866.35
  6. Step 6: Final answer
    x = 425,976.67

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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.