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Finding the Fourth Proportional to 607,687.40, 911,531.10 and 208,274.60

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Solution

The fourth proportional to 607,687.40, 911,531.10 and 208,274.60 is: 312,411.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,687.40 : 911,531.10 = 208,274.60 : x
  2. Step 2: Convert to fraction form
    607,687.40/911,531.10 = 208,274.60/x
  3. Step 3: Cross multiply
    607,687.40x = 911,531.10 × 208,274.60
  4. Step 4: Simplify right side
    607,687.40x = 189,848,775,240.06
  5. Step 5: Solve for x
    x = 189,848,775,240.06/607,687.40
  6. Step 6: Final answer
    x = 312,411.90

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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.