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Finding the Fourth Proportional to 620,998.65, 857,068.90 and 349,088.94

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Solution

The fourth proportional to 620,998.65, 857,068.90 and 349,088.94 is: 481,793.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,998.65 : 857,068.90 = 349,088.94 : x
  2. Step 2: Convert to fraction form
    620,998.65/857,068.90 = 349,088.94/x
  3. Step 3: Cross multiply
    620,998.65x = 857,068.90 × 349,088.94
  4. Step 4: Simplify right side
    620,998.65x = 299,193,272,935.24
  5. Step 5: Solve for x
    x = 299,193,272,935.24/620,998.65
  6. Step 6: Final answer
    x = 481,793.76

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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.