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Finding the Fourth Proportional to 403,283.79, 556,512.53 and 221,991.98

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Solution

The fourth proportional to 403,283.79, 556,512.53 and 221,991.98 is: 306,338.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,283.79 : 556,512.53 = 221,991.98 : x
  2. Step 2: Convert to fraction form
    403,283.79/556,512.53 = 221,991.98/x
  3. Step 3: Cross multiply
    403,283.79x = 556,512.53 × 221,991.98
  4. Step 4: Simplify right side
    403,283.79x = 123,541,314,536.99
  5. Step 5: Solve for x
    x = 123,541,314,536.99/403,283.79
  6. Step 6: Final answer
    x = 306,338.41

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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.