Home / 390,976.98-539,485.67-218,902.15

Finding the Fourth Proportional to 390,976.98, 539,485.67 and 218,902.15

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Solution

The fourth proportional to 390,976.98, 539,485.67 and 218,902.15 is: 302,049.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,976.98 : 539,485.67 = 218,902.15 : x
  2. Step 2: Convert to fraction form
    390,976.98/539,485.67 = 218,902.15/x
  3. Step 3: Cross multiply
    390,976.98x = 539,485.67 × 218,902.15
  4. Step 4: Simplify right side
    390,976.98x = 118,094,570,012.87
  5. Step 5: Solve for x
    x = 118,094,570,012.87/390,976.98
  6. Step 6: Final answer
    x = 302,049.93

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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.