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Finding the Fourth Proportional to 660,628.54, 911,679.40 and 374,208.10

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Solution

The fourth proportional to 660,628.54, 911,679.40 and 374,208.10 is: 516,413.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,628.54 : 911,679.40 = 374,208.10 : x
  2. Step 2: Convert to fraction form
    660,628.54/911,679.40 = 374,208.10/x
  3. Step 3: Cross multiply
    660,628.54x = 911,679.40 × 374,208.10
  4. Step 4: Simplify right side
    660,628.54x = 341,157,816,083.14
  5. Step 5: Solve for x
    x = 341,157,816,083.14/660,628.54
  6. Step 6: Final answer
    x = 516,413.98

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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.