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Finding the Fourth Proportional to 764,661.84, 1,055,259.84 and 420,511.84

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Solution

The fourth proportional to 764,661.84, 1,055,259.84 and 420,511.84 is: 580,320.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,661.84 : 1,055,259.84 = 420,511.84 : x
  2. Step 2: Convert to fraction form
    764,661.84/1,055,259.84 = 420,511.84/x
  3. Step 3: Cross multiply
    764,661.84x = 1,055,259.84 × 420,511.84
  4. Step 4: Simplify right side
    764,661.84x = 443,749,256,996.51
  5. Step 5: Solve for x
    x = 443,749,256,996.51/764,661.84
  6. Step 6: Final answer
    x = 580,320.91

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Double scale
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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.