Home / 1,378.23-2,068.22-1,287.10

Finding the Fourth Proportional to 1,378.23, 2,068.22 and 1,287.10

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Solution

The fourth proportional to 1,378.23, 2,068.22 and 1,287.10 is: 1,931.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.23 : 2,068.22 = 1,287.10 : x
  2. Step 2: Convert to fraction form
    1,378.23/2,068.22 = 1,287.10/x
  3. Step 3: Cross multiply
    1,378.23x = 2,068.22 × 1,287.10
  4. Step 4: Simplify right side
    1,378.23x = 2,662,005.96
  5. Step 5: Solve for x
    x = 2,662,005.96/1,378.23
  6. Step 6: Final answer
    x = 1,931.47

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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.