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Finding the Fourth Proportional to 752,332,565.80, 1,128,498,848.70 and 671,978,686.60

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Solution

The fourth proportional to 752,332,565.80, 1,128,498,848.70 and 671,978,686.60 is: 1,007,968,029.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    752,332,565.80 : 1,128,498,848.70 = 671,978,686.60 : x
  2. Step 2: Convert to fraction form
    752,332,565.80/1,128,498,848.70 = 671,978,686.60/x
  3. Step 3: Cross multiply
    752,332,565.80x = 1,128,498,848.70 × 671,978,686.60
  4. Step 4: Simplify right side
    752,332,565.80x = 758,327,174,179,038,208
  5. Step 5: Solve for x
    x = 758,327,174,179,038,208/752,332,565.80
  6. Step 6: Final answer
    x = 1,007,968,029.90

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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.