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Finding the Fourth Proportional to 714,318.45, 985,728.60 and 392,034.03

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Solution

The fourth proportional to 714,318.45, 985,728.60 and 392,034.03 is: 540,990.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,318.45 : 985,728.60 = 392,034.03 : x
  2. Step 2: Convert to fraction form
    714,318.45/985,728.60 = 392,034.03/x
  3. Step 3: Cross multiply
    714,318.45x = 985,728.60 × 392,034.03
  4. Step 4: Simplify right side
    714,318.45x = 386,439,155,544.26
  5. Step 5: Solve for x
    x = 386,439,155,544.26/714,318.45
  6. Step 6: Final answer
    x = 540,990.02

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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.