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Finding the Fourth Proportional to 680,907.80, 1,021,361.70 and 606,258.20

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Solution

The fourth proportional to 680,907.80, 1,021,361.70 and 606,258.20 is: 909,387.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,907.80 : 1,021,361.70 = 606,258.20 : x
  2. Step 2: Convert to fraction form
    680,907.80/1,021,361.70 = 606,258.20/x
  3. Step 3: Cross multiply
    680,907.80x = 1,021,361.70 × 606,258.20
  4. Step 4: Simplify right side
    680,907.80x = 619,208,905,790.94
  5. Step 5: Solve for x
    x = 619,208,905,790.94/680,907.80
  6. Step 6: Final answer
    x = 909,387.30

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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.