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Finding the Fourth Proportional to 478,538.78, 660,413.01 and 263,678.81

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Solution

The fourth proportional to 478,538.78, 660,413.01 and 263,678.81 is: 363,893.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,538.78 : 660,413.01 = 263,678.81 : x
  2. Step 2: Convert to fraction form
    478,538.78/660,413.01 = 263,678.81/x
  3. Step 3: Cross multiply
    478,538.78x = 660,413.01 × 263,678.81
  4. Step 4: Simplify right side
    478,538.78x = 174,136,916,585.32
  5. Step 5: Solve for x
    x = 174,136,916,585.32/478,538.78
  6. Step 6: Final answer
    x = 363,893.01

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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.