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Finding the Fourth Proportional to 499,469.12, 688,678.44 and 403,679.60

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Solution

The fourth proportional to 499,469.12, 688,678.44 and 403,679.60 is: 556,601.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,469.12 : 688,678.44 = 403,679.60 : x
  2. Step 2: Convert to fraction form
    499,469.12/688,678.44 = 403,679.60/x
  3. Step 3: Cross multiply
    499,469.12x = 688,678.44 × 403,679.60
  4. Step 4: Simplify right side
    499,469.12x = 278,005,437,187.82
  5. Step 5: Solve for x
    x = 278,005,437,187.82/499,469.12
  6. Step 6: Final answer
    x = 556,601.85

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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.