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Finding the Fourth Proportional to 612,868,927.80, 919,303,391.70 and 203,966,412.60

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Solution

The fourth proportional to 612,868,927.80, 919,303,391.70 and 203,966,412.60 is: 305,949,618.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,868,927.80 : 919,303,391.70 = 203,966,412.60 : x
  2. Step 2: Convert to fraction form
    612,868,927.80/919,303,391.70 = 203,966,412.60/x
  3. Step 3: Cross multiply
    612,868,927.80x = 919,303,391.70 × 203,966,412.60
  4. Step 4: Simplify right side
    612,868,927.80x = 187,507,014,896,061,632
  5. Step 5: Solve for x
    x = 187,507,014,896,061,632/612,868,927.80
  6. Step 6: Final answer
    x = 305,949,618.90

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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.