Home / 1,985.81-2,734.16-1,686.46

Finding the Fourth Proportional to 1,985.81, 2,734.16 and 1,686.46

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Solution

The fourth proportional to 1,985.81, 2,734.16 and 1,686.46 is: 2,322.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.81 : 2,734.16 = 1,686.46 : x
  2. Step 2: Convert to fraction form
    1,985.81/2,734.16 = 1,686.46/x
  3. Step 3: Cross multiply
    1,985.81x = 2,734.16 × 1,686.46
  4. Step 4: Simplify right side
    1,985.81x = 4,611,051.47
  5. Step 5: Solve for x
    x = 4,611,051.47/1,985.81
  6. Step 6: Final answer
    x = 2,322.00

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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.