Home / 687,826,092.35-949,175,072.28-420,349,413.58

Finding the Fourth Proportional to 687,826,092.35, 949,175,072.28 and 420,349,413.58

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Solution

The fourth proportional to 687,826,092.35, 949,175,072.28 and 420,349,413.58 is: 580,066,952.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,826,092.35 : 949,175,072.28 = 420,349,413.58 : x
  2. Step 2: Convert to fraction form
    687,826,092.35/949,175,072.28 = 420,349,413.58/x
  3. Step 3: Cross multiply
    687,826,092.35x = 949,175,072.28 × 420,349,413.58
  4. Step 4: Simplify right side
    687,826,092.35x = 398,985,185,010,804,480
  5. Step 5: Solve for x
    x = 398,985,185,010,804,480/687,826,092.35
  6. Step 6: Final answer
    x = 580,066,952.17

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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.