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Finding the Fourth Proportional to 608,085.60, 912,128.40 and 384,136.80

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Solution

The fourth proportional to 608,085.60, 912,128.40 and 384,136.80 is: 576,205.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,085.60 : 912,128.40 = 384,136.80 : x
  2. Step 2: Convert to fraction form
    608,085.60/912,128.40 = 384,136.80/x
  3. Step 3: Cross multiply
    608,085.60x = 912,128.40 × 384,136.80
  4. Step 4: Simplify right side
    608,085.60x = 350,382,084,765.12
  5. Step 5: Solve for x
    x = 350,382,084,765.12/608,085.60
  6. Step 6: Final answer
    x = 576,205.20

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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.