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Finding the Fourth Proportional to 714,270.99, 985,662.96 and 391,986.47

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Solution

The fourth proportional to 714,270.99, 985,662.96 and 391,986.47 is: 540,924.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,270.99 : 985,662.96 = 391,986.47 : x
  2. Step 2: Convert to fraction form
    714,270.99/985,662.96 = 391,986.47/x
  3. Step 3: Cross multiply
    714,270.99x = 985,662.96 × 391,986.47
  4. Step 4: Simplify right side
    714,270.99x = 386,366,544,300.15
  5. Step 5: Solve for x
    x = 386,366,544,300.15/714,270.99
  6. Step 6: Final answer
    x = 540,924.31

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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.