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Finding the Fourth Proportional to 447,118.40, 670,499.40 and 147,515.60

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Solution

The fourth proportional to 447,118.40, 670,499.40 and 147,515.60 is: 221,214.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,118.40 : 670,499.40 = 147,515.60 : x
  2. Step 2: Convert to fraction form
    447,118.40/670,499.40 = 147,515.60/x
  3. Step 3: Cross multiply
    447,118.40x = 670,499.40 × 147,515.60
  4. Step 4: Simplify right side
    447,118.40x = 98,909,121,290.64
  5. Step 5: Solve for x
    x = 98,909,121,290.64/447,118.40
  6. Step 6: Final answer
    x = 221,214.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.