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Finding the Fourth Proportional to 515,674.03, 711,616.48 and 286,230.66

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Solution

The fourth proportional to 515,674.03, 711,616.48 and 286,230.66 is: 394,990.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,674.03 : 711,616.48 = 286,230.66 : x
  2. Step 2: Convert to fraction form
    515,674.03/711,616.48 = 286,230.66/x
  3. Step 3: Cross multiply
    515,674.03x = 711,616.48 × 286,230.66
  4. Step 4: Simplify right side
    515,674.03x = 203,686,454,737.28
  5. Step 5: Solve for x
    x = 203,686,454,737.28/515,674.03
  6. Step 6: Final answer
    x = 394,990.72

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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.