Home / 878,751.25-1,212,619.51-491,499.57

Finding the Fourth Proportional to 878,751.25, 1,212,619.51 and 491,499.57

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Solution

The fourth proportional to 878,751.25, 1,212,619.51 and 491,499.57 is: 678,237.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,751.25 : 1,212,619.51 = 491,499.57 : x
  2. Step 2: Convert to fraction form
    878,751.25/1,212,619.51 = 491,499.57/x
  3. Step 3: Cross multiply
    878,751.25x = 1,212,619.51 × 491,499.57
  4. Step 4: Simplify right side
    878,751.25x = 596,001,972,900.31
  5. Step 5: Solve for x
    x = 596,001,972,900.31/878,751.25
  6. Step 6: Final answer
    x = 678,237.41

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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.