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Finding the Fourth Proportional to 617,128.80, 925,511.76 and 262,140

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Solution

The fourth proportional to 617,128.80, 925,511.76 and 262,140 is: 393,132.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,128.80 : 925,511.76 = 262,140 : x
  2. Step 2: Convert to fraction form
    617,128.80/925,511.76 = 262,140/x
  3. Step 3: Cross multiply
    617,128.80x = 925,511.76 × 262,140
  4. Step 4: Simplify right side
    617,128.80x = 242,613,652,766.40
  5. Step 5: Solve for x
    x = 242,613,652,766.40/617,128.80
  6. Step 6: Final answer
    x = 393,132.93

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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.