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Finding the Fourth Proportional to 455,424.40, 683,136.60 and 139,880.80

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Solution

The fourth proportional to 455,424.40, 683,136.60 and 139,880.80 is: 209,821.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,424.40 : 683,136.60 = 139,880.80 : x
  2. Step 2: Convert to fraction form
    455,424.40/683,136.60 = 139,880.80/x
  3. Step 3: Cross multiply
    455,424.40x = 683,136.60 × 139,880.80
  4. Step 4: Simplify right side
    455,424.40x = 95,557,694,117.28
  5. Step 5: Solve for x
    x = 95,557,694,117.28/455,424.40
  6. Step 6: Final answer
    x = 209,821.20

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Similar ratio
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1.5x scale

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.