Home / 1,359.30-2,038.80-385.44

Finding the Fourth Proportional to 1,359.30, 2,038.80 and 385.44

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Solution

The fourth proportional to 1,359.30, 2,038.80 and 385.44 is: 578.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.30 : 2,038.80 = 385.44 : x
  2. Step 2: Convert to fraction form
    1,359.30/2,038.80 = 385.44/x
  3. Step 3: Cross multiply
    1,359.30x = 2,038.80 × 385.44
  4. Step 4: Simplify right side
    1,359.30x = 785,835.07
  5. Step 5: Solve for x
    x = 785,835.07/1,359.30
  6. Step 6: Final answer
    x = 578.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.