Home / 391,849.95-540,342.32-290,088.84

Finding the Fourth Proportional to 391,849.95, 540,342.32 and 290,088.84

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Solution

The fourth proportional to 391,849.95, 540,342.32 and 290,088.84 is: 400,018.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,849.95 : 540,342.32 = 290,088.84 : x
  2. Step 2: Convert to fraction form
    391,849.95/540,342.32 = 290,088.84/x
  3. Step 3: Cross multiply
    391,849.95x = 540,342.32 × 290,088.84
  4. Step 4: Simplify right side
    391,849.95x = 156,747,275,361.27
  5. Step 5: Solve for x
    x = 156,747,275,361.27/391,849.95
  6. Step 6: Final answer
    x = 400,018.62

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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.