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Finding the Fourth Proportional to 660,310.02, 990,310.23 and 211,071.06

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Solution

The fourth proportional to 660,310.02, 990,310.23 and 211,071.06 is: 316,557.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,310.02 : 990,310.23 = 211,071.06 : x
  2. Step 2: Convert to fraction form
    660,310.02/990,310.23 = 211,071.06/x
  3. Step 3: Cross multiply
    660,310.02x = 990,310.23 × 211,071.06
  4. Step 4: Simplify right side
    660,310.02x = 209,025,829,974.94
  5. Step 5: Solve for x
    x = 209,025,829,974.94/660,310.02
  6. Step 6: Final answer
    x = 316,557.11

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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.