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Finding the Fourth Proportional to 353,853.90, 488,358.72 and 210,614.40

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Solution

The fourth proportional to 353,853.90, 488,358.72 and 210,614.40 is: 290,671.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,853.90 : 488,358.72 = 210,614.40 : x
  2. Step 2: Convert to fraction form
    353,853.90/488,358.72 = 210,614.40/x
  3. Step 3: Cross multiply
    353,853.90x = 488,358.72 × 210,614.40
  4. Step 4: Simplify right side
    353,853.90x = 102,855,378,797.57
  5. Step 5: Solve for x
    x = 102,855,378,797.57/353,853.90
  6. Step 6: Final answer
    x = 290,671.88

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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.