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Finding the Fourth Proportional to 1,216.32, 1,678.08 and 744.03

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Solution

The fourth proportional to 1,216.32, 1,678.08 and 744.03 is: 1,026.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.32 : 1,678.08 = 744.03 : x
  2. Step 2: Convert to fraction form
    1,216.32/1,678.08 = 744.03/x
  3. Step 3: Cross multiply
    1,216.32x = 1,678.08 × 744.03
  4. Step 4: Simplify right side
    1,216.32x = 1,248,541.86
  5. Step 5: Solve for x
    x = 1,248,541.86/1,216.32
  6. Step 6: Final answer
    x = 1,026.49

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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.