Home / 743,120.81-1,025,569.96-420,888.23

Finding the Fourth Proportional to 743,120.81, 1,025,569.96 and 420,888.23

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Solution

The fourth proportional to 743,120.81, 1,025,569.96 and 420,888.23 is: 580,861.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,120.81 : 1,025,569.96 = 420,888.23 : x
  2. Step 2: Convert to fraction form
    743,120.81/1,025,569.96 = 420,888.23/x
  3. Step 3: Cross multiply
    743,120.81x = 1,025,569.96 × 420,888.23
  4. Step 4: Simplify right side
    743,120.81x = 431,650,325,205.57
  5. Step 5: Solve for x
    x = 431,650,325,205.57/743,120.81
  6. Step 6: Final answer
    x = 580,861.58

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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.