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Finding the Fourth Proportional to 1,021,792, 1,410,507 and 727,632.40

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Solution

The fourth proportional to 1,021,792, 1,410,507 and 727,632.40 is: 1,004,441.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021,792 : 1,410,507 = 727,632.40 : x
  2. Step 2: Convert to fraction form
    1,021,792/1,410,507 = 727,632.40/x
  3. Step 3: Cross multiply
    1,021,792x = 1,410,507 × 727,632.40
  4. Step 4: Simplify right side
    1,021,792x = 1,026,330,593,626.80
  5. Step 5: Solve for x
    x = 1,026,330,593,626.80/1,021,792
  6. Step 6: Final answer
    x = 1,004,441.80

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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.