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Finding the Fourth Proportional to 411,466.80, 616,811.40 and 243,116.40

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Solution

The fourth proportional to 411,466.80, 616,811.40 and 243,116.40 is: 364,444.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,466.80 : 616,811.40 = 243,116.40 : x
  2. Step 2: Convert to fraction form
    411,466.80/616,811.40 = 243,116.40/x
  3. Step 3: Cross multiply
    411,466.80x = 616,811.40 × 243,116.40
  4. Step 4: Simplify right side
    411,466.80x = 149,956,967,046.96
  5. Step 5: Solve for x
    x = 149,956,967,046.96/411,466.80
  6. Step 6: Final answer
    x = 364,444.88

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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.