Home / 1,638.63-2,260.96-975.35

Finding the Fourth Proportional to 1,638.63, 2,260.96 and 975.35

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Solution

The fourth proportional to 1,638.63, 2,260.96 and 975.35 is: 1,345.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.63 : 2,260.96 = 975.35 : x
  2. Step 2: Convert to fraction form
    1,638.63/2,260.96 = 975.35/x
  3. Step 3: Cross multiply
    1,638.63x = 2,260.96 × 975.35
  4. Step 4: Simplify right side
    1,638.63x = 2,205,227.34
  5. Step 5: Solve for x
    x = 2,205,227.34/1,638.63
  6. Step 6: Final answer
    x = 1,345.78

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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.