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Finding the Fourth Proportional to 402,647.63, 555,639.56 and 221,358.23

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Solution

The fourth proportional to 402,647.63, 555,639.56 and 221,358.23 is: 305,466.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,647.63 : 555,639.56 = 221,358.23 : x
  2. Step 2: Convert to fraction form
    402,647.63/555,639.56 = 221,358.23/x
  3. Step 3: Cross multiply
    402,647.63x = 555,639.56 × 221,358.23
  4. Step 4: Simplify right side
    402,647.63x = 122,995,388,940.59
  5. Step 5: Solve for x
    x = 122,995,388,940.59/402,647.63
  6. Step 6: Final answer
    x = 305,466.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.