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Finding the Fourth Proportional to 368,678.40, 553,233 and 155,433.36

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Solution

The fourth proportional to 368,678.40, 553,233 and 155,433.36 is: 233,240.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,678.40 : 553,233 = 155,433.36 : x
  2. Step 2: Convert to fraction form
    368,678.40/553,233 = 155,433.36/x
  3. Step 3: Cross multiply
    368,678.40x = 553,233 × 155,433.36
  4. Step 4: Simplify right side
    368,678.40x = 85,990,864,052.88
  5. Step 5: Solve for x
    x = 85,990,864,052.88/368,678.40
  6. Step 6: Final answer
    x = 233,240.85

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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.