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Finding the Fourth Proportional to 245,857.80, 368,719.20 and 155,765.28

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Solution

The fourth proportional to 245,857.80, 368,719.20 and 155,765.28 is: 233,605.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,857.80 : 368,719.20 = 155,765.28 : x
  2. Step 2: Convert to fraction form
    245,857.80/368,719.20 = 155,765.28/x
  3. Step 3: Cross multiply
    245,857.80x = 368,719.20 × 155,765.28
  4. Step 4: Simplify right side
    245,857.80x = 57,433,649,429.38
  5. Step 5: Solve for x
    x = 57,433,649,429.38/245,857.80
  6. Step 6: Final answer
    x = 233,605.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.