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Finding the Fourth Proportional to 386,467.80, 579,413.70 and 199,613.40

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Solution

The fourth proportional to 386,467.80, 579,413.70 and 199,613.40 is: 299,271.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,467.80 : 579,413.70 = 199,613.40 : x
  2. Step 2: Convert to fraction form
    386,467.80/579,413.70 = 199,613.40/x
  3. Step 3: Cross multiply
    386,467.80x = 579,413.70 × 199,613.40
  4. Step 4: Simplify right side
    386,467.80x = 115,658,738,663.58
  5. Step 5: Solve for x
    x = 115,658,738,663.58/386,467.80
  6. Step 6: Final answer
    x = 299,271.35

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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.