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Finding the Fourth Proportional to 936.77, 1,292.43 and 543.51

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Solution

The fourth proportional to 936.77, 1,292.43 and 543.51 is: 749.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.77 : 1,292.43 = 543.51 : x
  2. Step 2: Convert to fraction form
    936.77/1,292.43 = 543.51/x
  3. Step 3: Cross multiply
    936.77x = 1,292.43 × 543.51
  4. Step 4: Simplify right side
    936.77x = 702,448.63
  5. Step 5: Solve for x
    x = 702,448.63/936.77
  6. Step 6: Final answer
    x = 749.87

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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.