Home / 842,236.88-1,263,355.32-421,088.72

Finding the Fourth Proportional to 842,236.88, 1,263,355.32 and 421,088.72

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Solution

The fourth proportional to 842,236.88, 1,263,355.32 and 421,088.72 is: 631,633.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    842,236.88 : 1,263,355.32 = 421,088.72 : x
  2. Step 2: Convert to fraction form
    842,236.88/1,263,355.32 = 421,088.72/x
  3. Step 3: Cross multiply
    842,236.88x = 1,263,355.32 × 421,088.72
  4. Step 4: Simplify right side
    842,236.88x = 531,984,674,603.99
  5. Step 5: Solve for x
    x = 531,984,674,603.99/842,236.88
  6. Step 6: Final answer
    x = 631,633.08

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.