Home / 402,904.40-556,022.69-221,630.35

Finding the Fourth Proportional to 402,904.40, 556,022.69 and 221,630.35

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Solution

The fourth proportional to 402,904.40, 556,022.69 and 221,630.35 is: 305,857.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,904.40 : 556,022.69 = 221,630.35 : x
  2. Step 2: Convert to fraction form
    402,904.40/556,022.69 = 221,630.35/x
  3. Step 3: Cross multiply
    402,904.40x = 556,022.69 × 221,630.35
  4. Step 4: Simplify right side
    402,904.40x = 123,231,503,392.64
  5. Step 5: Solve for x
    x = 123,231,503,392.64/402,904.40
  6. Step 6: Final answer
    x = 305,857.92

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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.