Home / 1,646.40-2,271.18-1,115.31

Finding the Fourth Proportional to 1,646.40, 2,271.18 and 1,115.31

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Solution

The fourth proportional to 1,646.40, 2,271.18 and 1,115.31 is: 1,538.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.40 : 2,271.18 = 1,115.31 : x
  2. Step 2: Convert to fraction form
    1,646.40/2,271.18 = 1,115.31/x
  3. Step 3: Cross multiply
    1,646.40x = 2,271.18 × 1,115.31
  4. Step 4: Simplify right side
    1,646.40x = 2,533,069.77
  5. Step 5: Solve for x
    x = 2,533,069.77/1,646.40
  6. Step 6: Final answer
    x = 1,538.55

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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.