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Finding the Fourth Proportional to 621,000.65, 857,071.66 and 349,090.94

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Solution

The fourth proportional to 621,000.65, 857,071.66 and 349,090.94 is: 481,796.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,000.65 : 857,071.66 = 349,090.94 : x
  2. Step 2: Convert to fraction form
    621,000.65/857,071.66 = 349,090.94/x
  3. Step 3: Cross multiply
    621,000.65x = 857,071.66 × 349,090.94
  4. Step 4: Simplify right side
    621,000.65x = 299,195,951,436.76
  5. Step 5: Solve for x
    x = 299,195,951,436.76/621,000.65
  6. Step 6: Final answer
    x = 481,796.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.