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Finding the Fourth Proportional to 476,640.50, 715,059.21 and 139,692.20

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Solution

The fourth proportional to 476,640.50, 715,059.21 and 139,692.20 is: 209,567.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,640.50 : 715,059.21 = 139,692.20 : x
  2. Step 2: Convert to fraction form
    476,640.50/715,059.21 = 139,692.20/x
  3. Step 3: Cross multiply
    476,640.50x = 715,059.21 × 139,692.20
  4. Step 4: Simplify right side
    476,640.50x = 99,888,194,175.16
  5. Step 5: Solve for x
    x = 99,888,194,175.16/476,640.50
  6. Step 6: Final answer
    x = 209,567.16

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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.