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Finding the Fourth Proportional to 720,749.36, 993,405.94 and 659,663.48

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Solution

The fourth proportional to 720,749.36, 993,405.94 and 659,663.48 is: 909,211.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,749.36 : 993,405.94 = 659,663.48 : x
  2. Step 2: Convert to fraction form
    720,749.36/993,405.94 = 659,663.48/x
  3. Step 3: Cross multiply
    720,749.36x = 993,405.94 × 659,663.48
  4. Step 4: Simplify right side
    720,749.36x = 655,313,619,433.07
  5. Step 5: Solve for x
    x = 655,313,619,433.07/720,749.36
  6. Step 6: Final answer
    x = 909,211.52

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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.