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Finding the Fourth Proportional to 460,803, 691,244.10 and 128,379

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Solution

The fourth proportional to 460,803, 691,244.10 and 128,379 is: 192,579.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,803 : 691,244.10 = 128,379 : x
  2. Step 2: Convert to fraction form
    460,803/691,244.10 = 128,379/x
  3. Step 3: Cross multiply
    460,803x = 691,244.10 × 128,379
  4. Step 4: Simplify right side
    460,803x = 88,741,226,313.90
  5. Step 5: Solve for x
    x = 88,741,226,313.90/460,803
  6. Step 6: Final answer
    x = 192,579.53

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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.