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Finding the Fourth Proportional to 286,237.76, 395,015.64 and 158,918.72

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Solution

The fourth proportional to 286,237.76, 395,015.64 and 158,918.72 is: 219,312.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,237.76 : 395,015.64 = 158,918.72 : x
  2. Step 2: Convert to fraction form
    286,237.76/395,015.64 = 158,918.72/x
  3. Step 3: Cross multiply
    286,237.76x = 395,015.64 × 158,918.72
  4. Step 4: Simplify right side
    286,237.76x = 62,775,379,888.78
  5. Step 5: Solve for x
    x = 62,775,379,888.78/286,237.76
  6. Step 6: Final answer
    x = 219,312.01

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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.