Home / 855,421.20-1,180,401.28-511,188.82

Finding the Fourth Proportional to 855,421.20, 1,180,401.28 and 511,188.82

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Solution

The fourth proportional to 855,421.20, 1,180,401.28 and 511,188.82 is: 705,392.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,421.20 : 1,180,401.28 = 511,188.82 : x
  2. Step 2: Convert to fraction form
    855,421.20/1,180,401.28 = 511,188.82/x
  3. Step 3: Cross multiply
    855,421.20x = 1,180,401.28 × 511,188.82
  4. Step 4: Simplify right side
    855,421.20x = 603,407,937,449.69
  5. Step 5: Solve for x
    x = 603,407,937,449.69/855,421.20
  6. Step 6: Final answer
    x = 705,392.78

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Double scale
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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.