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Finding the Fourth Proportional to 388,890.72, 536,712.48 and 245,643.84

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Solution

The fourth proportional to 388,890.72, 536,712.48 and 245,643.84 is: 339,015.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,890.72 : 536,712.48 = 245,643.84 : x
  2. Step 2: Convert to fraction form
    388,890.72/536,712.48 = 245,643.84/x
  3. Step 3: Cross multiply
    388,890.72x = 536,712.48 × 245,643.84
  4. Step 4: Simplify right side
    388,890.72x = 131,840,114,563.12
  5. Step 5: Solve for x
    x = 131,840,114,563.12/388,890.72
  6. Step 6: Final answer
    x = 339,015.84

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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.