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Finding the Fourth Proportional to 708.51, 976.14 and 621.03

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Solution

The fourth proportional to 708.51, 976.14 and 621.03 is: 855.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.51 : 976.14 = 621.03 : x
  2. Step 2: Convert to fraction form
    708.51/976.14 = 621.03/x
  3. Step 3: Cross multiply
    708.51x = 976.14 × 621.03
  4. Step 4: Simplify right side
    708.51x = 606,212.22
  5. Step 5: Solve for x
    x = 606,212.22/708.51
  6. Step 6: Final answer
    x = 855.62

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Double scale
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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.