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Finding the Fourth Proportional to 936.76, 1,292.64 and 543.84

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Solution

The fourth proportional to 936.76, 1,292.64 and 543.84 is: 750.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.76 : 1,292.64 = 543.84 : x
  2. Step 2: Convert to fraction form
    936.76/1,292.64 = 543.84/x
  3. Step 3: Cross multiply
    936.76x = 1,292.64 × 543.84
  4. Step 4: Simplify right side
    936.76x = 702,989.34
  5. Step 5: Solve for x
    x = 702,989.34/936.76
  6. Step 6: Final answer
    x = 750.45

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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.