Home / 764,814.84-1,055,470.05-420,665.28

Finding the Fourth Proportional to 764,814.84, 1,055,470.05 and 420,665.28

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Solution

The fourth proportional to 764,814.84, 1,055,470.05 and 420,665.28 is: 580,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,814.84 : 1,055,470.05 = 420,665.28 : x
  2. Step 2: Convert to fraction form
    764,814.84/1,055,470.05 = 420,665.28/x
  3. Step 3: Cross multiply
    764,814.84x = 1,055,470.05 × 420,665.28
  4. Step 4: Simplify right side
    764,814.84x = 443,999,604,114.86
  5. Step 5: Solve for x
    x = 443,999,604,114.86/764,814.84
  6. Step 6: Final answer
    x = 580,532.15

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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.