Home / 1,312.28-1,968.44-338.36

Finding the Fourth Proportional to 1,312.28, 1,968.44 and 338.36

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Solution

The fourth proportional to 1,312.28, 1,968.44 and 338.36 is: 507.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.28 : 1,968.44 = 338.36 : x
  2. Step 2: Convert to fraction form
    1,312.28/1,968.44 = 338.36/x
  3. Step 3: Cross multiply
    1,312.28x = 1,968.44 × 338.36
  4. Step 4: Simplify right side
    1,312.28x = 666,041.36
  5. Step 5: Solve for x
    x = 666,041.36/1,312.28
  6. Step 6: Final answer
    x = 507.55

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1.5x scale

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.