Home / 1,376.39-2,064.78-402.35

Finding the Fourth Proportional to 1,376.39, 2,064.78 and 402.35

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Solution

The fourth proportional to 1,376.39, 2,064.78 and 402.35 is: 603.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.39 : 2,064.78 = 402.35 : x
  2. Step 2: Convert to fraction form
    1,376.39/2,064.78 = 402.35/x
  3. Step 3: Cross multiply
    1,376.39x = 2,064.78 × 402.35
  4. Step 4: Simplify right side
    1,376.39x = 830,764.23
  5. Step 5: Solve for x
    x = 830,764.23/1,376.39
  6. Step 6: Final answer
    x = 603.58

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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.