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Finding the Fourth Proportional to 653,136.80, 979,705.20 and 485,175.20

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Solution

The fourth proportional to 653,136.80, 979,705.20 and 485,175.20 is: 727,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,136.80 : 979,705.20 = 485,175.20 : x
  2. Step 2: Convert to fraction form
    653,136.80/979,705.20 = 485,175.20/x
  3. Step 3: Cross multiply
    653,136.80x = 979,705.20 × 485,175.20
  4. Step 4: Simplify right side
    653,136.80x = 475,328,666,351.04
  5. Step 5: Solve for x
    x = 475,328,666,351.04/653,136.80
  6. Step 6: Final answer
    x = 727,762.80

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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.