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Finding the Fourth Proportional to 885,756.40, 1,328,375.40 and 317,071.60

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Solution

The fourth proportional to 885,756.40, 1,328,375.40 and 317,071.60 is: 475,514.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,756.40 : 1,328,375.40 = 317,071.60 : x
  2. Step 2: Convert to fraction form
    885,756.40/1,328,375.40 = 317,071.60/x
  3. Step 3: Cross multiply
    885,756.40x = 1,328,375.40 × 317,071.60
  4. Step 4: Simplify right side
    885,756.40x = 421,190,113,478.64
  5. Step 5: Solve for x
    x = 421,190,113,478.64/885,756.40
  6. Step 6: Final answer
    x = 475,514.61

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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.