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Finding the Fourth Proportional to 358,639.20, 537,764.40 and 148,039.20

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Solution

The fourth proportional to 358,639.20, 537,764.40 and 148,039.20 is: 221,978.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,639.20 : 537,764.40 = 148,039.20 : x
  2. Step 2: Convert to fraction form
    358,639.20/537,764.40 = 148,039.20/x
  3. Step 3: Cross multiply
    358,639.20x = 537,764.40 × 148,039.20
  4. Step 4: Simplify right side
    358,639.20x = 79,610,211,564.48
  5. Step 5: Solve for x
    x = 79,610,211,564.48/358,639.20
  6. Step 6: Final answer
    x = 221,978.56

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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.