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Finding the Fourth Proportional to 556,404.26, 767,879.09 and 311,413.51

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Solution

The fourth proportional to 556,404.26, 767,879.09 and 311,413.51 is: 429,773.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,404.26 : 767,879.09 = 311,413.51 : x
  2. Step 2: Convert to fraction form
    556,404.26/767,879.09 = 311,413.51/x
  3. Step 3: Cross multiply
    556,404.26x = 767,879.09 × 311,413.51
  4. Step 4: Simplify right side
    556,404.26x = 239,127,923,243.09
  5. Step 5: Solve for x
    x = 239,127,923,243.09/556,404.26
  6. Step 6: Final answer
    x = 429,773.71

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1.5x scale

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.