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Finding the Fourth Proportional to 1,312.27, 1,968.42 and 338.35

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Solution

The fourth proportional to 1,312.27, 1,968.42 and 338.35 is: 507.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.27 : 1,968.42 = 338.35 : x
  2. Step 2: Convert to fraction form
    1,312.27/1,968.42 = 338.35/x
  3. Step 3: Cross multiply
    1,312.27x = 1,968.42 × 338.35
  4. Step 4: Simplify right side
    1,312.27x = 666,005.06
  5. Step 5: Solve for x
    x = 666,005.06/1,312.27
  6. Step 6: Final answer
    x = 507.52

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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.