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Finding the Fourth Proportional to 426,015.82, 638,366.88 and 209,626.18

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Solution

The fourth proportional to 426,015.82, 638,366.88 and 209,626.18 is: 314,116.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,015.82 : 638,366.88 = 209,626.18 : x
  2. Step 2: Convert to fraction form
    426,015.82/638,366.88 = 209,626.18/x
  3. Step 3: Cross multiply
    426,015.82x = 638,366.88 × 209,626.18
  4. Step 4: Simplify right side
    426,015.82x = 133,818,410,492.92
  5. Step 5: Solve for x
    x = 133,818,410,492.92/426,015.82
  6. Step 6: Final answer
    x = 314,116.06

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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.