Home / 687,268.71-1,030,488.89-308,120.81

Finding the Fourth Proportional to 687,268.71, 1,030,488.89 and 308,120.81

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Solution

The fourth proportional to 687,268.71, 1,030,488.89 and 308,120.81 is: 461,995.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,268.71 : 1,030,488.89 = 308,120.81 : x
  2. Step 2: Convert to fraction form
    687,268.71/1,030,488.89 = 308,120.81/x
  3. Step 3: Cross multiply
    687,268.71x = 1,030,488.89 × 308,120.81
  4. Step 4: Simplify right side
    687,268.71x = 317,515,064,789.75
  5. Step 5: Solve for x
    x = 317,515,064,789.75/687,268.71
  6. Step 6: Final answer
    x = 461,995.52

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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.