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Finding the Fourth Proportional to 500,388.57, 690,526.35 and 285,493.95

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Solution

The fourth proportional to 500,388.57, 690,526.35 and 285,493.95 is: 393,976.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,388.57 : 690,526.35 = 285,493.95 : x
  2. Step 2: Convert to fraction form
    500,388.57/690,526.35 = 285,493.95/x
  3. Step 3: Cross multiply
    500,388.57x = 690,526.35 × 285,493.95
  4. Step 4: Simplify right side
    500,388.57x = 197,141,095,240.58
  5. Step 5: Solve for x
    x = 197,141,095,240.58/500,388.57
  6. Step 6: Final answer
    x = 393,976.02

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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.