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Finding the Fourth Proportional to 353,411.82, 487,671.90 and 210,144.18

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Solution

The fourth proportional to 353,411.82, 487,671.90 and 210,144.18 is: 289,977.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,411.82 : 487,671.90 = 210,144.18 : x
  2. Step 2: Convert to fraction form
    353,411.82/487,671.90 = 210,144.18/x
  3. Step 3: Cross multiply
    353,411.82x = 487,671.90 × 210,144.18
  4. Step 4: Simplify right side
    353,411.82x = 102,481,411,534.54
  5. Step 5: Solve for x
    x = 102,481,411,534.54/353,411.82
  6. Step 6: Final answer
    x = 289,977.32

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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.