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Finding the Fourth Proportional to 660,804.17, 990,721.46 and 211,266.32

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Solution

The fourth proportional to 660,804.17, 990,721.46 and 211,266.32 is: 316,744.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,804.17 : 990,721.46 = 211,266.32 : x
  2. Step 2: Convert to fraction form
    660,804.17/990,721.46 = 211,266.32/x
  3. Step 3: Cross multiply
    660,804.17x = 990,721.46 × 211,266.32
  4. Step 4: Simplify right side
    660,804.17x = 209,306,072,573.79
  5. Step 5: Solve for x
    x = 209,306,072,573.79/660,804.17
  6. Step 6: Final answer
    x = 316,744.48

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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.