Home / 1,635.40-2,256.64-972.12

Finding the Fourth Proportional to 1,635.40, 2,256.64 and 972.12

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Solution

The fourth proportional to 1,635.40, 2,256.64 and 972.12 is: 1,341.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.40 : 2,256.64 = 972.12 : x
  2. Step 2: Convert to fraction form
    1,635.40/2,256.64 = 972.12/x
  3. Step 3: Cross multiply
    1,635.40x = 2,256.64 × 972.12
  4. Step 4: Simplify right side
    1,635.40x = 2,193,724.88
  5. Step 5: Solve for x
    x = 2,193,724.88/1,635.40
  6. Step 6: Final answer
    x = 1,341.40

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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.