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Finding the Fourth Proportional to 656,413.76, 905,838.36 and 369,928.10

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Solution

The fourth proportional to 656,413.76, 905,838.36 and 369,928.10 is: 510,493.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,413.76 : 905,838.36 = 369,928.10 : x
  2. Step 2: Convert to fraction form
    656,413.76/905,838.36 = 369,928.10/x
  3. Step 3: Cross multiply
    656,413.76x = 905,838.36 × 369,928.10
  4. Step 4: Simplify right side
    656,413.76x = 335,095,063,421.92
  5. Step 5: Solve for x
    x = 335,095,063,421.92/656,413.76
  6. Step 6: Final answer
    x = 510,493.66

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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.