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Finding the Fourth Proportional to 299,378.80, 448,412.10 and 266,136.40

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Solution

The fourth proportional to 299,378.80, 448,412.10 and 266,136.40 is: 398,621.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,378.80 : 448,412.10 = 266,136.40 : x
  2. Step 2: Convert to fraction form
    299,378.80/448,412.10 = 266,136.40/x
  3. Step 3: Cross multiply
    299,378.80x = 448,412.10 × 266,136.40
  4. Step 4: Simplify right side
    299,378.80x = 119,338,782,010.44
  5. Step 5: Solve for x
    x = 119,338,782,010.44/299,378.80
  6. Step 6: Final answer
    x = 398,621.35

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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.