Home / 389,904.04-538,006.90-220,134.60

Finding the Fourth Proportional to 389,904.04, 538,006.90 and 220,134.60

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Solution

The fourth proportional to 389,904.04, 538,006.90 and 220,134.60 is: 303,751.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,904.04 : 538,006.90 = 220,134.60 : x
  2. Step 2: Convert to fraction form
    389,904.04/538,006.90 = 220,134.60/x
  3. Step 3: Cross multiply
    389,904.04x = 538,006.90 × 220,134.60
  4. Step 4: Simplify right side
    389,904.04x = 118,433,933,728.74
  5. Step 5: Solve for x
    x = 118,433,933,728.74/389,904.04
  6. Step 6: Final answer
    x = 303,751.49

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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.