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Finding the Fourth Proportional to 398,413.50, 549,810.63 and 219,565.50

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Solution

The fourth proportional to 398,413.50, 549,810.63 and 219,565.50 is: 303,000.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,413.50 : 549,810.63 = 219,565.50 : x
  2. Step 2: Convert to fraction form
    398,413.50/549,810.63 = 219,565.50/x
  3. Step 3: Cross multiply
    398,413.50x = 549,810.63 × 219,565.50
  4. Step 4: Simplify right side
    398,413.50x = 120,719,445,881.27
  5. Step 5: Solve for x
    x = 120,719,445,881.27/398,413.50
  6. Step 6: Final answer
    x = 303,000.39

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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.