Home / 813,875.64-1,123,161.83-451,314.78

Finding the Fourth Proportional to 813,875.64, 1,123,161.83 and 451,314.78

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Solution

The fourth proportional to 813,875.64, 1,123,161.83 and 451,314.78 is: 622,821.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,875.64 : 1,123,161.83 = 451,314.78 : x
  2. Step 2: Convert to fraction form
    813,875.64/1,123,161.83 = 451,314.78/x
  3. Step 3: Cross multiply
    813,875.64x = 1,123,161.83 × 451,314.78
  4. Step 4: Simplify right side
    813,875.64x = 506,899,534,210.85
  5. Step 5: Solve for x
    x = 506,899,534,210.85/813,875.64
  6. Step 6: Final answer
    x = 622,821.85

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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.