Home / 638,391.37-880,986.07-351,921.70

Finding the Fourth Proportional to 638,391.37, 880,986.07 and 351,921.70

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Solution

The fourth proportional to 638,391.37, 880,986.07 and 351,921.70 is: 485,655.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,391.37 : 880,986.07 = 351,921.70 : x
  2. Step 2: Convert to fraction form
    638,391.37/880,986.07 = 351,921.70/x
  3. Step 3: Cross multiply
    638,391.37x = 880,986.07 × 351,921.70
  4. Step 4: Simplify right side
    638,391.37x = 310,038,115,430.72
  5. Step 5: Solve for x
    x = 310,038,115,430.72/638,391.37
  6. Step 6: Final answer
    x = 485,655.25

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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.