Home / 812,983.76-1,121,916.78-450,430.19

Finding the Fourth Proportional to 812,983.76, 1,121,916.78 and 450,430.19

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Solution

The fourth proportional to 812,983.76, 1,121,916.78 and 450,430.19 is: 621,593.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,983.76 : 1,121,916.78 = 450,430.19 : x
  2. Step 2: Convert to fraction form
    812,983.76/1,121,916.78 = 450,430.19/x
  3. Step 3: Cross multiply
    812,983.76x = 1,121,916.78 × 450,430.19
  4. Step 4: Simplify right side
    812,983.76x = 505,345,182,770.00
  5. Step 5: Solve for x
    x = 505,345,182,770.00/812,983.76
  6. Step 6: Final answer
    x = 621,593.21

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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.