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Finding the Fourth Proportional to 420,366.87, 630,655.91 and 120,847.98

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Solution

The fourth proportional to 420,366.87, 630,655.91 and 120,847.98 is: 181,302.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,366.87 : 630,655.91 = 120,847.98 : x
  2. Step 2: Convert to fraction form
    420,366.87/630,655.91 = 120,847.98/x
  3. Step 3: Cross multiply
    420,366.87x = 630,655.91 × 120,847.98
  4. Step 4: Simplify right side
    420,366.87x = 76,213,492,798.56
  5. Step 5: Solve for x
    x = 76,213,492,798.56/420,366.87
  6. Step 6: Final answer
    x = 181,302.33

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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.