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Finding the Fourth Proportional to 936.15, 1,402.47 and 783.06

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Solution

The fourth proportional to 936.15, 1,402.47 and 783.06 is: 1,173.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.15 : 1,402.47 = 783.06 : x
  2. Step 2: Convert to fraction form
    936.15/1,402.47 = 783.06/x
  3. Step 3: Cross multiply
    936.15x = 1,402.47 × 783.06
  4. Step 4: Simplify right side
    936.15x = 1,098,218.16
  5. Step 5: Solve for x
    x = 1,098,218.16/936.15
  6. Step 6: Final answer
    x = 1,173.12

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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.