Home / 428,413.48-643,005.68-228,904.40

Finding the Fourth Proportional to 428,413.48, 643,005.68 and 228,904.40

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Solution

The fourth proportional to 428,413.48, 643,005.68 and 228,904.40 is: 343,562.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,413.48 : 643,005.68 = 228,904.40 : x
  2. Step 2: Convert to fraction form
    428,413.48/643,005.68 = 228,904.40/x
  3. Step 3: Cross multiply
    428,413.48x = 643,005.68 × 228,904.40
  4. Step 4: Simplify right side
    428,413.48x = 147,186,829,839.98
  5. Step 5: Solve for x
    x = 147,186,829,839.98/428,413.48
  6. Step 6: Final answer
    x = 343,562.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.