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Finding the Fourth Proportional to 459,803.79, 689,697.63 and 206,905.28

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Solution

The fourth proportional to 459,803.79, 689,697.63 and 206,905.28 is: 310,354.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,803.79 : 689,697.63 = 206,905.28 : x
  2. Step 2: Convert to fraction form
    459,803.79/689,697.63 = 206,905.28/x
  3. Step 3: Cross multiply
    459,803.79x = 689,697.63 × 206,905.28
  4. Step 4: Simplify right side
    459,803.79x = 142,702,082,974.73
  5. Step 5: Solve for x
    x = 142,702,082,974.73/459,803.79
  6. Step 6: Final answer
    x = 310,354.30

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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.