Home / 778,571.34-1,074,428.55-439,039.68

Finding the Fourth Proportional to 778,571.34, 1,074,428.55 and 439,039.68

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Solution

The fourth proportional to 778,571.34, 1,074,428.55 and 439,039.68 is: 605,874.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,571.34 : 1,074,428.55 = 439,039.68 : x
  2. Step 2: Convert to fraction form
    778,571.34/1,074,428.55 = 439,039.68/x
  3. Step 3: Cross multiply
    778,571.34x = 1,074,428.55 × 439,039.68
  4. Step 4: Simplify right side
    778,571.34x = 471,716,766,774.86
  5. Step 5: Solve for x
    x = 471,716,766,774.86/778,571.34
  6. Step 6: Final answer
    x = 605,874.82

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1.5x scale

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.