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Finding the Fourth Proportional to 389,429.36, 530,203.40 and 388,229.84

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Solution

The fourth proportional to 389,429.36, 530,203.40 and 388,229.84 is: 528,570.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,429.36 : 530,203.40 = 388,229.84 : x
  2. Step 2: Convert to fraction form
    389,429.36/530,203.40 = 388,229.84/x
  3. Step 3: Cross multiply
    389,429.36x = 530,203.40 × 388,229.84
  4. Step 4: Simplify right side
    389,429.36x = 205,840,781,149.46
  5. Step 5: Solve for x
    x = 205,840,781,149.46/389,429.36
  6. Step 6: Final answer
    x = 528,570.27

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1.5x scale

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.