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Finding the Fourth Proportional to 509,656.20, 703,364.94 and 305,715.12

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Solution

The fourth proportional to 509,656.20, 703,364.94 and 305,715.12 is: 421,910.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,656.20 : 703,364.94 = 305,715.12 : x
  2. Step 2: Convert to fraction form
    509,656.20/703,364.94 = 305,715.12/x
  3. Step 3: Cross multiply
    509,656.20x = 703,364.94 × 305,715.12
  4. Step 4: Simplify right side
    509,656.20x = 215,029,297,035.89
  5. Step 5: Solve for x
    x = 215,029,297,035.89/509,656.20
  6. Step 6: Final answer
    x = 421,910.49

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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.