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Finding the Fourth Proportional to 353,411.34, 487,671.24 and 210,143.71

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Solution

The fourth proportional to 353,411.34, 487,671.24 and 210,143.71 is: 289,976.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,411.34 : 487,671.24 = 210,143.71 : x
  2. Step 2: Convert to fraction form
    353,411.34/487,671.24 = 210,143.71/x
  3. Step 3: Cross multiply
    353,411.34x = 487,671.24 × 210,143.71
  4. Step 4: Simplify right side
    353,411.34x = 102,481,043,633.90
  5. Step 5: Solve for x
    x = 102,481,043,633.90/353,411.34
  6. Step 6: Final answer
    x = 289,976.67

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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.