Home / 521,400.75-719,141.34-349,512.57

Finding the Fourth Proportional to 521,400.75, 719,141.34 and 349,512.57

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Solution

The fourth proportional to 521,400.75, 719,141.34 and 349,512.57 is: 482,064.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,400.75 : 719,141.34 = 349,512.57 : x
  2. Step 2: Convert to fraction form
    521,400.75/719,141.34 = 349,512.57/x
  3. Step 3: Cross multiply
    521,400.75x = 719,141.34 × 349,512.57
  4. Step 4: Simplify right side
    521,400.75x = 251,348,937,281.31
  5. Step 5: Solve for x
    x = 251,348,937,281.31/521,400.75
  6. Step 6: Final answer
    x = 482,064.78

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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.