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Finding the Fourth Proportional to 559,995.80, 839,993.70 and 420,027.80

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Solution

The fourth proportional to 559,995.80, 839,993.70 and 420,027.80 is: 630,041.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,995.80 : 839,993.70 = 420,027.80 : x
  2. Step 2: Convert to fraction form
    559,995.80/839,993.70 = 420,027.80/x
  3. Step 3: Cross multiply
    559,995.80x = 839,993.70 × 420,027.80
  4. Step 4: Simplify right side
    559,995.80x = 352,820,705,824.86
  5. Step 5: Solve for x
    x = 352,820,705,824.86/559,995.80
  6. Step 6: Final answer
    x = 630,041.70

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Similar ratio
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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.