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Finding the Fourth Proportional to 791,978.40, 1,185,634.80 and 745,840.80

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Solution

The fourth proportional to 791,978.40, 1,185,634.80 and 745,840.80 is: 1,116,564.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    791,978.40 : 1,185,634.80 = 745,840.80 : x
  2. Step 2: Convert to fraction form
    791,978.40/1,185,634.80 = 745,840.80/x
  3. Step 3: Cross multiply
    791,978.40x = 1,185,634.80 × 745,840.80
  4. Step 4: Simplify right side
    791,978.40x = 884,294,807,739.84
  5. Step 5: Solve for x
    x = 884,294,807,739.84/791,978.40
  6. Step 6: Final answer
    x = 1,116,564.30

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.