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Finding the Fourth Proportional to 270,436.80, 405,655.20 and 70,756.80

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Solution

The fourth proportional to 270,436.80, 405,655.20 and 70,756.80 is: 106,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,436.80 : 405,655.20 = 70,756.80 : x
  2. Step 2: Convert to fraction form
    270,436.80/405,655.20 = 70,756.80/x
  3. Step 3: Cross multiply
    270,436.80x = 405,655.20 × 70,756.80
  4. Step 4: Simplify right side
    270,436.80x = 28,702,863,855.36
  5. Step 5: Solve for x
    x = 28,702,863,855.36/270,436.80
  6. Step 6: Final answer
    x = 106,135.20

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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.