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Finding the Fourth Proportional to 700,972.38, 967,361.94 and 390,882.12

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Solution

The fourth proportional to 700,972.38, 967,361.94 and 390,882.12 is: 539,428.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,972.38 : 967,361.94 = 390,882.12 : x
  2. Step 2: Convert to fraction form
    700,972.38/967,361.94 = 390,882.12/x
  3. Step 3: Cross multiply
    700,972.38x = 967,361.94 × 390,882.12
  4. Step 4: Simplify right side
    700,972.38x = 378,124,485,914.51
  5. Step 5: Solve for x
    x = 378,124,485,914.51/700,972.38
  6. Step 6: Final answer
    x = 539,428.51

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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.