Home / 1,312.02-1,963.14-1,155.09

Finding the Fourth Proportional to 1,312.02, 1,963.14 and 1,155.09

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Solution

The fourth proportional to 1,312.02, 1,963.14 and 1,155.09 is: 1,728.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.02 : 1,963.14 = 1,155.09 : x
  2. Step 2: Convert to fraction form
    1,312.02/1,963.14 = 1,155.09/x
  3. Step 3: Cross multiply
    1,312.02x = 1,963.14 × 1,155.09
  4. Step 4: Simplify right side
    1,312.02x = 2,267,603.38
  5. Step 5: Solve for x
    x = 2,267,603.38/1,312.02
  6. Step 6: Final answer
    x = 1,728.33

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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.