Home / 827,096,413.20-1,240,644,619.80-438,719,330.40

Finding the Fourth Proportional to 827,096,413.20, 1,240,644,619.80 and 438,719,330.40

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Solution

The fourth proportional to 827,096,413.20, 1,240,644,619.80 and 438,719,330.40 is: 658,078,995.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,096,413.20 : 1,240,644,619.80 = 438,719,330.40 : x
  2. Step 2: Convert to fraction form
    827,096,413.20/1,240,644,619.80 = 438,719,330.40/x
  3. Step 3: Cross multiply
    827,096,413.20x = 1,240,644,619.80 × 438,719,330.40
  4. Step 4: Simplify right side
    827,096,413.20x = 544,294,776,863,018,560
  5. Step 5: Solve for x
    x = 544,294,776,863,018,560/827,096,413.20
  6. Step 6: Final answer
    x = 658,078,995.60

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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.