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Finding the Fourth Proportional to 386,005.60, 577,779.60 and 275,413.60

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Solution

The fourth proportional to 386,005.60, 577,779.60 and 275,413.60 is: 412,243.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,005.60 : 577,779.60 = 275,413.60 : x
  2. Step 2: Convert to fraction form
    386,005.60/577,779.60 = 275,413.60/x
  3. Step 3: Cross multiply
    386,005.60x = 577,779.60 × 275,413.60
  4. Step 4: Simplify right side
    386,005.60x = 159,128,359,642.56
  5. Step 5: Solve for x
    x = 159,128,359,642.56/386,005.60
  6. Step 6: Final answer
    x = 412,243.66

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1.5x scale

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.