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Finding the Fourth Proportional to 390,601.50, 539,087.59 and 247,374.86

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Solution

The fourth proportional to 390,601.50, 539,087.59 and 247,374.86 is: 341,413.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,601.50 : 539,087.59 = 247,374.86 : x
  2. Step 2: Convert to fraction form
    390,601.50/539,087.59 = 247,374.86/x
  3. Step 3: Cross multiply
    390,601.50x = 539,087.59 × 247,374.86
  4. Step 4: Simplify right side
    390,601.50x = 133,356,717,103.99
  5. Step 5: Solve for x
    x = 133,356,717,103.99/390,601.50
  6. Step 6: Final answer
    x = 341,413.74

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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.