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Finding the Fourth Proportional to 486,305.50, 671,213.56 and 285,166.30

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Solution

The fourth proportional to 486,305.50, 671,213.56 and 285,166.30 is: 393,595.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,305.50 : 671,213.56 = 285,166.30 : x
  2. Step 2: Convert to fraction form
    486,305.50/671,213.56 = 285,166.30/x
  3. Step 3: Cross multiply
    486,305.50x = 671,213.56 × 285,166.30
  4. Step 4: Simplify right side
    486,305.50x = 191,407,487,415.03
  5. Step 5: Solve for x
    x = 191,407,487,415.03/486,305.50
  6. Step 6: Final answer
    x = 393,595.15

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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.