Home / 812,870.53-1,121,761.38-450,317.89

Finding the Fourth Proportional to 812,870.53, 1,121,761.38 and 450,317.89

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Solution

The fourth proportional to 812,870.53, 1,121,761.38 and 450,317.89 is: 621,438.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,870.53 : 1,121,761.38 = 450,317.89 : x
  2. Step 2: Convert to fraction form
    812,870.53/1,121,761.38 = 450,317.89/x
  3. Step 3: Cross multiply
    812,870.53x = 1,121,761.38 × 450,317.89
  4. Step 4: Simplify right side
    812,870.53x = 505,149,217,725.09
  5. Step 5: Solve for x
    x = 505,149,217,725.09/812,870.53
  6. Step 6: Final answer
    x = 621,438.72

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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.