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Finding the Fourth Proportional to 403,178.53, 556,365.63 and 221,907.67

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Solution

The fourth proportional to 403,178.53, 556,365.63 and 221,907.67 is: 306,221.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,178.53 : 556,365.63 = 221,907.67 : x
  2. Step 2: Convert to fraction form
    403,178.53/556,365.63 = 221,907.67/x
  3. Step 3: Cross multiply
    403,178.53x = 556,365.63 × 221,907.67
  4. Step 4: Simplify right side
    403,178.53x = 123,461,799,230.47
  5. Step 5: Solve for x
    x = 123,461,799,230.47/403,178.53
  6. Step 6: Final answer
    x = 306,221.17

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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.