Home / 1,638.55-2,260.96-975.39

Finding the Fourth Proportional to 1,638.55, 2,260.96 and 975.39

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Solution

The fourth proportional to 1,638.55, 2,260.96 and 975.39 is: 1,345.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.55 : 2,260.96 = 975.39 : x
  2. Step 2: Convert to fraction form
    1,638.55/2,260.96 = 975.39/x
  3. Step 3: Cross multiply
    1,638.55x = 2,260.96 × 975.39
  4. Step 4: Simplify right side
    1,638.55x = 2,205,306.86
  5. Step 5: Solve for x
    x = 2,205,306.86/1,638.55
  6. Step 6: Final answer
    x = 1,345.89

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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.