Home / 687,826,091.85-949,175,071.59-420,349,413.08

Finding the Fourth Proportional to 687,826,091.85, 949,175,071.59 and 420,349,413.08

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Solution

The fourth proportional to 687,826,091.85, 949,175,071.59 and 420,349,413.08 is: 580,066,951.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,826,091.85 : 949,175,071.59 = 420,349,413.08 : x
  2. Step 2: Convert to fraction form
    687,826,091.85/949,175,071.59 = 420,349,413.08/x
  3. Step 3: Cross multiply
    687,826,091.85x = 949,175,071.59 × 420,349,413.08
  4. Step 4: Simplify right side
    687,826,091.85x = 398,985,184,248,076,928
  5. Step 5: Solve for x
    x = 398,985,184,248,076,928/687,826,091.85
  6. Step 6: Final answer
    x = 580,066,951.48

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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.