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Finding the Fourth Proportional to 420,003.95, 630,008.21 and 104,460.86

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Solution

The fourth proportional to 420,003.95, 630,008.21 and 104,460.86 is: 156,691.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,003.95 : 630,008.21 = 104,460.86 : x
  2. Step 2: Convert to fraction form
    420,003.95/630,008.21 = 104,460.86/x
  3. Step 3: Cross multiply
    420,003.95x = 630,008.21 × 104,460.86
  4. Step 4: Simplify right side
    420,003.95x = 65,811,199,423.66
  5. Step 5: Solve for x
    x = 65,811,199,423.66/420,003.95
  6. Step 6: Final answer
    x = 156,691.86

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1.5x scale

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.