Home / 1,686.32-2,322.36-1,312.64

Finding the Fourth Proportional to 1,686.32, 2,322.36 and 1,312.64

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Solution

The fourth proportional to 1,686.32, 2,322.36 and 1,312.64 is: 1,807.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.32 : 2,322.36 = 1,312.64 : x
  2. Step 2: Convert to fraction form
    1,686.32/2,322.36 = 1,312.64/x
  3. Step 3: Cross multiply
    1,686.32x = 2,322.36 × 1,312.64
  4. Step 4: Simplify right side
    1,686.32x = 3,048,422.63
  5. Step 5: Solve for x
    x = 3,048,422.63/1,686.32
  6. Step 6: Final answer
    x = 1,807.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.