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Finding the Fourth Proportional to 680,678.90, 939,084.21 and 679,629.14

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Solution

The fourth proportional to 680,678.90, 939,084.21 and 679,629.14 is: 937,635.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,678.90 : 939,084.21 = 679,629.14 : x
  2. Step 2: Convert to fraction form
    680,678.90/939,084.21 = 679,629.14/x
  3. Step 3: Cross multiply
    680,678.90x = 939,084.21 × 679,629.14
  4. Step 4: Simplify right side
    680,678.90x = 638,228,994,029.88
  5. Step 5: Solve for x
    x = 638,228,994,029.88/680,678.90
  6. Step 6: Final answer
    x = 937,635.93

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1.5x scale

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.