Home / 789,955.56-1,090,135.71-427,378.26

Finding the Fourth Proportional to 789,955.56, 1,090,135.71 and 427,378.26

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Solution

The fourth proportional to 789,955.56, 1,090,135.71 and 427,378.26 is: 589,780.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,955.56 : 1,090,135.71 = 427,378.26 : x
  2. Step 2: Convert to fraction form
    789,955.56/1,090,135.71 = 427,378.26/x
  3. Step 3: Cross multiply
    789,955.56x = 1,090,135.71 × 427,378.26
  4. Step 4: Simplify right side
    789,955.56x = 465,900,302,903.67
  5. Step 5: Solve for x
    x = 465,900,302,903.67/789,955.56
  6. Step 6: Final answer
    x = 589,780.40

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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.