Home / 1,395.16-2,087.76-1,312.12

Finding the Fourth Proportional to 1,395.16, 2,087.76 and 1,312.12

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Solution

The fourth proportional to 1,395.16, 2,087.76 and 1,312.12 is: 1,963.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.16 : 2,087.76 = 1,312.12 : x
  2. Step 2: Convert to fraction form
    1,395.16/2,087.76 = 1,312.12/x
  3. Step 3: Cross multiply
    1,395.16x = 2,087.76 × 1,312.12
  4. Step 4: Simplify right side
    1,395.16x = 2,739,391.65
  5. Step 5: Solve for x
    x = 2,739,391.65/1,395.16
  6. Step 6: Final answer
    x = 1,963.50

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1.5x scale

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.