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Finding the Fourth Proportional to 628,735.50, 867,655.09 and 342,257.74

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Solution

The fourth proportional to 628,735.50, 867,655.09 and 342,257.74 is: 472,315.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,735.50 : 867,655.09 = 342,257.74 : x
  2. Step 2: Convert to fraction form
    628,735.50/867,655.09 = 342,257.74/x
  3. Step 3: Cross multiply
    628,735.50x = 867,655.09 × 342,257.74
  4. Step 4: Simplify right side
    628,735.50x = 296,961,668,461.58
  5. Step 5: Solve for x
    x = 296,961,668,461.58/628,735.50
  6. Step 6: Final answer
    x = 472,315.73

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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.