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Finding the Fourth Proportional to 278,803,413.60, 418,205,120.40 and 248,670,708.90

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Solution

The fourth proportional to 278,803,413.60, 418,205,120.40 and 248,670,708.90 is: 373,006,063.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,803,413.60 : 418,205,120.40 = 248,670,708.90 : x
  2. Step 2: Convert to fraction form
    278,803,413.60/418,205,120.40 = 248,670,708.90/x
  3. Step 3: Cross multiply
    278,803,413.60x = 418,205,120.40 × 248,670,708.90
  4. Step 4: Simplify right side
    278,803,413.60x = 103,995,363,755,477,856
  5. Step 5: Solve for x
    x = 103,995,363,755,477,856/278,803,413.60
  6. Step 6: Final answer
    x = 373,006,063.35

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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.