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Finding the Fourth Proportional to 478,638.23, 660,520.76 and 263,778.29

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Solution

The fourth proportional to 478,638.23, 660,520.76 and 263,778.29 is: 364,014.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,638.23 : 660,520.76 = 263,778.29 : x
  2. Step 2: Convert to fraction form
    478,638.23/660,520.76 = 263,778.29/x
  3. Step 3: Cross multiply
    478,638.23x = 660,520.76 × 263,778.29
  4. Step 4: Simplify right side
    478,638.23x = 174,231,031,960.81
  5. Step 5: Solve for x
    x = 174,231,031,960.81/478,638.23
  6. Step 6: Final answer
    x = 364,014.04

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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.