Home / 638,135.28-880,632.60-351,665.64

Finding the Fourth Proportional to 638,135.28, 880,632.60 and 351,665.64

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Solution

The fourth proportional to 638,135.28, 880,632.60 and 351,665.64 is: 485,301.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,135.28 : 880,632.60 = 351,665.64 : x
  2. Step 2: Convert to fraction form
    638,135.28/880,632.60 = 351,665.64/x
  3. Step 3: Cross multiply
    638,135.28x = 880,632.60 × 351,665.64
  4. Step 4: Simplify right side
    638,135.28x = 309,688,226,883.86
  5. Step 5: Solve for x
    x = 309,688,226,883.86/638,135.28
  6. Step 6: Final answer
    x = 485,301.84

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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.