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Finding the Fourth Proportional to 248,916.63, 343,530.86 and 153,420.87

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Solution

The fourth proportional to 248,916.63, 343,530.86 and 153,420.87 is: 211,736.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,916.63 : 343,530.86 = 153,420.87 : x
  2. Step 2: Convert to fraction form
    248,916.63/343,530.86 = 153,420.87/x
  3. Step 3: Cross multiply
    248,916.63x = 343,530.86 × 153,420.87
  4. Step 4: Simplify right side
    248,916.63x = 52,704,803,413.05
  5. Step 5: Solve for x
    x = 52,704,803,413.05/248,916.63
  6. Step 6: Final answer
    x = 211,736.77

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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.