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Finding the Fourth Proportional to 781,797.78, 1,078,883.01 and 424,101.78

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Solution

The fourth proportional to 781,797.78, 1,078,883.01 and 424,101.78 is: 585,261.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,797.78 : 1,078,883.01 = 424,101.78 : x
  2. Step 2: Convert to fraction form
    781,797.78/1,078,883.01 = 424,101.78/x
  3. Step 3: Cross multiply
    781,797.78x = 1,078,883.01 × 424,101.78
  4. Step 4: Simplify right side
    781,797.78x = 457,556,204,952.76
  5. Step 5: Solve for x
    x = 457,556,204,952.76/781,797.78
  6. Step 6: Final answer
    x = 585,261.58

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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.