Home / 1,686.60-2,325.72-1,312.92

Finding the Fourth Proportional to 1,686.60, 2,325.72 and 1,312.92

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Solution

The fourth proportional to 1,686.60, 2,325.72 and 1,312.92 is: 1,810.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.60 : 2,325.72 = 1,312.92 : x
  2. Step 2: Convert to fraction form
    1,686.60/2,325.72 = 1,312.92/x
  3. Step 3: Cross multiply
    1,686.60x = 2,325.72 × 1,312.92
  4. Step 4: Simplify right side
    1,686.60x = 3,053,484.30
  5. Step 5: Solve for x
    x = 3,053,484.30/1,686.60
  6. Step 6: Final answer
    x = 1,810.44

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1.5x scale

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.