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Finding the Fourth Proportional to 368,639.30, 552,527.30 and 140,785.68

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Solution

The fourth proportional to 368,639.30, 552,527.30 and 140,785.68 is: 211,013.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,639.30 : 552,527.30 = 140,785.68 : x
  2. Step 2: Convert to fraction form
    368,639.30/552,527.30 = 140,785.68/x
  3. Step 3: Cross multiply
    368,639.30x = 552,527.30 × 140,785.68
  4. Step 4: Simplify right side
    368,639.30x = 77,787,931,649.06
  5. Step 5: Solve for x
    x = 77,787,931,649.06/368,639.30
  6. Step 6: Final answer
    x = 211,013.67

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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.