Home / 1,359.28-2,038.58-385.48

Finding the Fourth Proportional to 1,359.28, 2,038.58 and 385.48

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Solution

The fourth proportional to 1,359.28, 2,038.58 and 385.48 is: 578.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.28 : 2,038.58 = 385.48 : x
  2. Step 2: Convert to fraction form
    1,359.28/2,038.58 = 385.48/x
  3. Step 3: Cross multiply
    1,359.28x = 2,038.58 × 385.48
  4. Step 4: Simplify right side
    1,359.28x = 785,831.82
  5. Step 5: Solve for x
    x = 785,831.82/1,359.28
  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.