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Finding the Fourth Proportional to 209,959,640.80, 314,939,461.20 and 188,796,479.20

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Solution

The fourth proportional to 209,959,640.80, 314,939,461.20 and 188,796,479.20 is: 283,194,718.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,959,640.80 : 314,939,461.20 = 188,796,479.20 : x
  2. Step 2: Convert to fraction form
    209,959,640.80/314,939,461.20 = 188,796,479.20/x
  3. Step 3: Cross multiply
    209,959,640.80x = 314,939,461.20 × 188,796,479.20
  4. Step 4: Simplify right side
    209,959,640.80x = 59,459,461,435,705,000
  5. Step 5: Solve for x
    x = 59,459,461,435,705,000/209,959,640.80
  6. Step 6: Final answer
    x = 283,194,718.80

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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.