Home / 1,426.25-2,139.80-646.93

Finding the Fourth Proportional to 1,426.25, 2,139.80 and 646.93

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Solution

The fourth proportional to 1,426.25, 2,139.80 and 646.93 is: 970.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.25 : 2,139.80 = 646.93 : x
  2. Step 2: Convert to fraction form
    1,426.25/2,139.80 = 646.93/x
  3. Step 3: Cross multiply
    1,426.25x = 2,139.80 × 646.93
  4. Step 4: Simplify right side
    1,426.25x = 1,384,300.81
  5. Step 5: Solve for x
    x = 1,384,300.81/1,426.25
  6. Step 6: Final answer
    x = 970.59

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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.