Home / 1,638.54-2,261.34-975.42

Finding the Fourth Proportional to 1,638.54, 2,261.34 and 975.42

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Solution

The fourth proportional to 1,638.54, 2,261.34 and 975.42 is: 1,346.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.54 : 2,261.34 = 975.42 : x
  2. Step 2: Convert to fraction form
    1,638.54/2,261.34 = 975.42/x
  3. Step 3: Cross multiply
    1,638.54x = 2,261.34 × 975.42
  4. Step 4: Simplify right side
    1,638.54x = 2,205,756.26
  5. Step 5: Solve for x
    x = 2,205,756.26/1,638.54
  6. Step 6: Final answer
    x = 1,346.17

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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.