Home / 389,405.80-537,069-268,519.36

Finding the Fourth Proportional to 389,405.80, 537,069 and 268,519.36

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Solution

The fourth proportional to 389,405.80, 537,069 and 268,519.36 is: 370,342.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,405.80 : 537,069 = 268,519.36 : x
  2. Step 2: Convert to fraction form
    389,405.80/537,069 = 268,519.36/x
  3. Step 3: Cross multiply
    389,405.80x = 537,069 × 268,519.36
  4. Step 4: Simplify right side
    389,405.80x = 144,213,424,155.84
  5. Step 5: Solve for x
    x = 144,213,424,155.84/389,405.80
  6. Step 6: Final answer
    x = 370,342.26

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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.