Home / 388,916.12-536,685-219,161.18

Finding the Fourth Proportional to 388,916.12, 536,685 and 219,161.18

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Solution

The fourth proportional to 388,916.12, 536,685 and 219,161.18 is: 302,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,916.12 : 536,685 = 219,161.18 : x
  2. Step 2: Convert to fraction form
    388,916.12/536,685 = 219,161.18/x
  3. Step 3: Cross multiply
    388,916.12x = 536,685 × 219,161.18
  4. Step 4: Simplify right side
    388,916.12x = 117,620,517,888.30
  5. Step 5: Solve for x
    x = 117,620,517,888.30/388,916.12
  6. Step 6: Final answer
    x = 302,431.58

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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.