Home / 812,015.79-1,217,994.53-212,972.19

Finding the Fourth Proportional to 812,015.79, 1,217,994.53 and 212,972.19

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Solution

The fourth proportional to 812,015.79, 1,217,994.53 and 212,972.19 is: 319,450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,015.79 : 1,217,994.53 = 212,972.19 : x
  2. Step 2: Convert to fraction form
    812,015.79/1,217,994.53 = 212,972.19/x
  3. Step 3: Cross multiply
    812,015.79x = 1,217,994.53 × 212,972.19
  4. Step 4: Simplify right side
    812,015.79x = 259,398,961,397.26
  5. Step 5: Solve for x
    x = 259,398,961,397.26/812,015.79
  6. Step 6: Final answer
    x = 319,450.64

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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.