Home / 1,013.07-1,398.14-620.35

Finding the Fourth Proportional to 1,013.07, 1,398.14 and 620.35

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Solution

The fourth proportional to 1,013.07, 1,398.14 and 620.35 is: 856.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.07 : 1,398.14 = 620.35 : x
  2. Step 2: Convert to fraction form
    1,013.07/1,398.14 = 620.35/x
  3. Step 3: Cross multiply
    1,013.07x = 1,398.14 × 620.35
  4. Step 4: Simplify right side
    1,013.07x = 867,336.15
  5. Step 5: Solve for x
    x = 867,336.15/1,013.07
  6. Step 6: Final answer
    x = 856.15

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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.