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Finding the Fourth Proportional to 402,485.46, 555,418.65 and 221,197.32

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Solution

The fourth proportional to 402,485.46, 555,418.65 and 221,197.32 is: 305,246.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,485.46 : 555,418.65 = 221,197.32 : x
  2. Step 2: Convert to fraction form
    402,485.46/555,418.65 = 221,197.32/x
  3. Step 3: Cross multiply
    402,485.46x = 555,418.65 × 221,197.32
  4. Step 4: Simplify right side
    402,485.46x = 122,857,116,858.02
  5. Step 5: Solve for x
    x = 122,857,116,858.02/402,485.46
  6. Step 6: Final answer
    x = 305,246.10

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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.