Home / 871,335.20-1,305,110.10-421,111.86

Finding the Fourth Proportional to 871,335.20, 1,305,110.10 and 421,111.86

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Solution

The fourth proportional to 871,335.20, 1,305,110.10 and 421,111.86 is: 630,753.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,335.20 : 1,305,110.10 = 421,111.86 : x
  2. Step 2: Convert to fraction form
    871,335.20/1,305,110.10 = 421,111.86/x
  3. Step 3: Cross multiply
    871,335.20x = 1,305,110.10 × 421,111.86
  4. Step 4: Simplify right side
    871,335.20x = 549,597,342,188.91
  5. Step 5: Solve for x
    x = 549,597,342,188.91/871,335.20
  6. Step 6: Final answer
    x = 630,753.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.