Home / 638,391.29-880,970.45-351,905.22

Finding the Fourth Proportional to 638,391.29, 880,970.45 and 351,905.22

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Solution

The fourth proportional to 638,391.29, 880,970.45 and 351,905.22 is: 485,623.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,391.29 : 880,970.45 = 351,905.22 : x
  2. Step 2: Convert to fraction form
    638,391.29/880,970.45 = 351,905.22/x
  3. Step 3: Cross multiply
    638,391.29x = 880,970.45 × 351,905.22
  4. Step 4: Simplify right side
    638,391.29x = 310,018,098,261.22
  5. Step 5: Solve for x
    x = 310,018,098,261.22/638,391.29
  6. Step 6: Final answer
    x = 485,623.95

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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.