Home / 813,123.30-1,122,109.05-450,570.64

Finding the Fourth Proportional to 813,123.30, 1,122,109.05 and 450,570.64

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Solution

The fourth proportional to 813,123.30, 1,122,109.05 and 450,570.64 is: 621,786.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,123.30 : 1,122,109.05 = 450,570.64 : x
  2. Step 2: Convert to fraction form
    813,123.30/1,122,109.05 = 450,570.64/x
  3. Step 3: Cross multiply
    813,123.30x = 1,122,109.05 × 450,570.64
  4. Step 4: Simplify right side
    813,123.30x = 505,589,392,808.29
  5. Step 5: Solve for x
    x = 505,589,392,808.29/813,123.30
  6. Step 6: Final answer
    x = 621,786.87

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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.