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Finding the Fourth Proportional to 389,490.86, 537,522.27 and 219,663.02

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Solution

The fourth proportional to 389,490.86, 537,522.27 and 219,663.02 is: 303,149.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,490.86 : 537,522.27 = 219,663.02 : x
  2. Step 2: Convert to fraction form
    389,490.86/537,522.27 = 219,663.02/x
  3. Step 3: Cross multiply
    389,490.86x = 537,522.27 × 219,663.02
  4. Step 4: Simplify right side
    389,490.86x = 118,073,765,145.46
  5. Step 5: Solve for x
    x = 118,073,765,145.46/389,490.86
  6. Step 6: Final answer
    x = 303,149.00

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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.