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Finding the Fourth Proportional to 570,469.50, 787,217.97 and 312,296.95

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Solution

The fourth proportional to 570,469.50, 787,217.97 and 312,296.95 is: 430,953.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,469.50 : 787,217.97 = 312,296.95 : x
  2. Step 2: Convert to fraction form
    570,469.50/787,217.97 = 312,296.95/x
  3. Step 3: Cross multiply
    570,469.50x = 787,217.97 × 312,296.95
  4. Step 4: Simplify right side
    570,469.50x = 245,845,773,171.33
  5. Step 5: Solve for x
    x = 245,845,773,171.33/570,469.50
  6. Step 6: Final answer
    x = 430,953.40

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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.