Home / 819,984.76-1,131,091.81-638,409.08

Finding the Fourth Proportional to 819,984.76, 1,131,091.81 and 638,409.08

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Solution

The fourth proportional to 819,984.76, 1,131,091.81 and 638,409.08 is: 880,625.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,984.76 : 1,131,091.81 = 638,409.08 : x
  2. Step 2: Convert to fraction form
    819,984.76/1,131,091.81 = 638,409.08/x
  3. Step 3: Cross multiply
    819,984.76x = 1,131,091.81 × 638,409.08
  4. Step 4: Simplify right side
    819,984.76x = 722,099,281,817.64
  5. Step 5: Solve for x
    x = 722,099,281,817.64/819,984.76
  6. Step 6: Final answer
    x = 880,625.25

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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.