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Finding the Fourth Proportional to 666,906.84, 920,419.04 and 380,361.24

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Solution

The fourth proportional to 666,906.84, 920,419.04 and 380,361.24 is: 524,948.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,906.84 : 920,419.04 = 380,361.24 : x
  2. Step 2: Convert to fraction form
    666,906.84/920,419.04 = 380,361.24/x
  3. Step 3: Cross multiply
    666,906.84x = 920,419.04 × 380,361.24
  4. Step 4: Simplify right side
    666,906.84x = 350,091,727,374.01
  5. Step 5: Solve for x
    x = 350,091,727,374.01/666,906.84
  6. Step 6: Final answer
    x = 524,948.47

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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.