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Finding the Fourth Proportional to 720,951.51, 1,081,415.39 and 215,513.67

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Solution

The fourth proportional to 720,951.51, 1,081,415.39 and 215,513.67 is: 323,266.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,951.51 : 1,081,415.39 = 215,513.67 : x
  2. Step 2: Convert to fraction form
    720,951.51/1,081,415.39 = 215,513.67/x
  3. Step 3: Cross multiply
    720,951.51x = 1,081,415.39 × 215,513.67
  4. Step 4: Simplify right side
    720,951.51x = 233,059,798,415.81
  5. Step 5: Solve for x
    x = 233,059,798,415.81/720,951.51
  6. Step 6: Final answer
    x = 323,266.95

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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.