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Finding the Fourth Proportional to 511,413.39, 765,985.12 and 330,918.46

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Solution

The fourth proportional to 511,413.39, 765,985.12 and 330,918.46 is: 495,643.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,413.39 : 765,985.12 = 330,918.46 : x
  2. Step 2: Convert to fraction form
    511,413.39/765,985.12 = 330,918.46/x
  3. Step 3: Cross multiply
    511,413.39x = 765,985.12 × 330,918.46
  4. Step 4: Simplify right side
    511,413.39x = 253,478,610,808.80
  5. Step 5: Solve for x
    x = 253,478,610,808.80/511,413.39
  6. Step 6: Final answer
    x = 495,643.28

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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.