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Finding the Fourth Proportional to 282,662.40, 390,072.80 and 161,803

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Solution

The fourth proportional to 282,662.40, 390,072.80 and 161,803 is: 223,287.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,662.40 : 390,072.80 = 161,803 : x
  2. Step 2: Convert to fraction form
    282,662.40/390,072.80 = 161,803/x
  3. Step 3: Cross multiply
    282,662.40x = 390,072.80 × 161,803
  4. Step 4: Simplify right side
    282,662.40x = 63,114,949,258.40
  5. Step 5: Solve for x
    x = 63,114,949,258.40/282,662.40
  6. Step 6: Final answer
    x = 223,287.39

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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.