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Finding the Fourth Proportional to 499,090.36, 688,814.94 and 317,744.36

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Solution

The fourth proportional to 499,090.36, 688,814.94 and 317,744.36 is: 438,531.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,090.36 : 688,814.94 = 317,744.36 : x
  2. Step 2: Convert to fraction form
    499,090.36/688,814.94 = 317,744.36/x
  3. Step 3: Cross multiply
    499,090.36x = 688,814.94 × 317,744.36
  4. Step 4: Simplify right side
    499,090.36x = 218,867,062,268.74
  5. Step 5: Solve for x
    x = 218,867,062,268.74/499,090.36
  6. Step 6: Final answer
    x = 438,531.94

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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.