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Finding the Fourth Proportional to 384,911.20, 577,366.80 and 104,428.45

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Solution

The fourth proportional to 384,911.20, 577,366.80 and 104,428.45 is: 156,642.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,911.20 : 577,366.80 = 104,428.45 : x
  2. Step 2: Convert to fraction form
    384,911.20/577,366.80 = 104,428.45/x
  3. Step 3: Cross multiply
    384,911.20x = 577,366.80 × 104,428.45
  4. Step 4: Simplify right side
    384,911.20x = 60,293,520,005.46
  5. Step 5: Solve for x
    x = 60,293,520,005.46/384,911.20
  6. Step 6: Final answer
    x = 156,642.68

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Why These Related Problems?

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