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Finding the Fourth Proportional to 691,617.60, 954,413.28 and 385,703.28

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Solution

The fourth proportional to 691,617.60, 954,413.28 and 385,703.28 is: 532,259.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,617.60 : 954,413.28 = 385,703.28 : x
  2. Step 2: Convert to fraction form
    691,617.60/954,413.28 = 385,703.28/x
  3. Step 3: Cross multiply
    691,617.60x = 954,413.28 × 385,703.28
  4. Step 4: Simplify right side
    691,617.60x = 368,120,332,571.56
  5. Step 5: Solve for x
    x = 368,120,332,571.56/691,617.60
  6. Step 6: Final answer
    x = 532,259.93

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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.