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Finding the Fourth Proportional to 403,124.81, 556,300.45 and 221,836.63

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Solution

The fourth proportional to 403,124.81, 556,300.45 and 221,836.63 is: 306,128.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,124.81 : 556,300.45 = 221,836.63 : x
  2. Step 2: Convert to fraction form
    403,124.81/556,300.45 = 221,836.63/x
  3. Step 3: Cross multiply
    403,124.81x = 556,300.45 × 221,836.63
  4. Step 4: Simplify right side
    403,124.81x = 123,407,815,777.26
  5. Step 5: Solve for x
    x = 123,407,815,777.26/403,124.81
  6. Step 6: Final answer
    x = 306,128.06

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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.