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Finding the Fourth Proportional to 368,405.40, 552,585.55 and 216,686.38

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Solution

The fourth proportional to 368,405.40, 552,585.55 and 216,686.38 is: 325,016.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,405.40 : 552,585.55 = 216,686.38 : x
  2. Step 2: Convert to fraction form
    368,405.40/552,585.55 = 216,686.38/x
  3. Step 3: Cross multiply
    368,405.40x = 552,585.55 × 216,686.38
  4. Step 4: Simplify right side
    368,405.40x = 119,737,758,623.45
  5. Step 5: Solve for x
    x = 119,737,758,623.45/368,405.40
  6. Step 6: Final answer
    x = 325,016.30

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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.