Home / 389,428.36-530,202.04-388,228.84

Finding the Fourth Proportional to 389,428.36, 530,202.04 and 388,228.84

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Solution

The fourth proportional to 389,428.36, 530,202.04 and 388,228.84 is: 528,568.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,428.36 : 530,202.04 = 388,228.84 : x
  2. Step 2: Convert to fraction form
    389,428.36/530,202.04 = 388,228.84/x
  3. Step 3: Cross multiply
    389,428.36x = 530,202.04 × 388,228.84
  4. Step 4: Simplify right side
    389,428.36x = 205,839,722,954.83
  5. Step 5: Solve for x
    x = 205,839,722,954.83/389,428.36
  6. Step 6: Final answer
    x = 528,568.91

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.