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Finding the Fourth Proportional to 690,673, 1,036,157.70 and 391,297

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Solution

The fourth proportional to 690,673, 1,036,157.70 and 391,297 is: 587,029.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,673 : 1,036,157.70 = 391,297 : x
  2. Step 2: Convert to fraction form
    690,673/1,036,157.70 = 391,297/x
  3. Step 3: Cross multiply
    690,673x = 1,036,157.70 × 391,297
  4. Step 4: Simplify right side
    690,673x = 405,445,399,536.90
  5. Step 5: Solve for x
    x = 405,445,399,536.90/690,673
  6. Step 6: Final answer
    x = 587,029.46

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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.