Home / 687,402.90-1,030,690.13-308,255.09

Finding the Fourth Proportional to 687,402.90, 1,030,690.13 and 308,255.09

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Solution

The fourth proportional to 687,402.90, 1,030,690.13 and 308,255.09 is: 462,196.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,402.90 : 1,030,690.13 = 308,255.09 : x
  2. Step 2: Convert to fraction form
    687,402.90/1,030,690.13 = 308,255.09/x
  3. Step 3: Cross multiply
    687,402.90x = 1,030,690.13 × 308,255.09
  4. Step 4: Simplify right side
    687,402.90x = 317,715,472,090.54
  5. Step 5: Solve for x
    x = 317,715,472,090.54/687,402.90
  6. Step 6: Final answer
    x = 462,196.87

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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.