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Finding the Fourth Proportional to 729,542.40, 1,018,997.40 and 729,542.40

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Solution

The fourth proportional to 729,542.40, 1,018,997.40 and 729,542.40 is: 1,018,997.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,542.40 : 1,018,997.40 = 729,542.40 : x
  2. Step 2: Convert to fraction form
    729,542.40/1,018,997.40 = 729,542.40/x
  3. Step 3: Cross multiply
    729,542.40x = 1,018,997.40 × 729,542.40
  4. Step 4: Simplify right side
    729,542.40x = 743,401,808,789.76
  5. Step 5: Solve for x
    x = 743,401,808,789.76/729,542.40
  6. Step 6: Final answer
    x = 1,018,997.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.