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Finding the Fourth Proportional to 886,487, 1,329,730.50 and 221,639

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Solution

The fourth proportional to 886,487, 1,329,730.50 and 221,639 is: 332,458.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,487 : 1,329,730.50 = 221,639 : x
  2. Step 2: Convert to fraction form
    886,487/1,329,730.50 = 221,639/x
  3. Step 3: Cross multiply
    886,487x = 1,329,730.50 × 221,639
  4. Step 4: Simplify right side
    886,487x = 294,720,138,289.50
  5. Step 5: Solve for x
    x = 294,720,138,289.50/886,487
  6. Step 6: Final answer
    x = 332,458.50

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1.5x scale

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.