Home / 687,403.28-1,030,690.70-308,255.45

Finding the Fourth Proportional to 687,403.28, 1,030,690.70 and 308,255.45

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Solution

The fourth proportional to 687,403.28, 1,030,690.70 and 308,255.45 is: 462,197.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,403.28 : 1,030,690.70 = 308,255.45 : x
  2. Step 2: Convert to fraction form
    687,403.28/1,030,690.70 = 308,255.45/x
  3. Step 3: Cross multiply
    687,403.28x = 1,030,690.70 × 308,255.45
  4. Step 4: Simplify right side
    687,403.28x = 317,716,018,844.58
  5. Step 5: Solve for x
    x = 317,716,018,844.58/687,403.28
  6. Step 6: Final answer
    x = 462,197.42

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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.