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Finding the Fourth Proportional to 611,512.90, 917,269.35 and 328,077.70

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Solution

The fourth proportional to 611,512.90, 917,269.35 and 328,077.70 is: 492,116.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,512.90 : 917,269.35 = 328,077.70 : x
  2. Step 2: Convert to fraction form
    611,512.90/917,269.35 = 328,077.70/x
  3. Step 3: Cross multiply
    611,512.90x = 917,269.35 × 328,077.70
  4. Step 4: Simplify right side
    611,512.90x = 300,935,618,628.50
  5. Step 5: Solve for x
    x = 300,935,618,628.50/611,512.90
  6. Step 6: Final answer
    x = 492,116.55

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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.