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Finding the Fourth Proportional to 280,996.80, 421,349.40 and 103,412.40

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Solution

The fourth proportional to 280,996.80, 421,349.40 and 103,412.40 is: 155,064.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,996.80 : 421,349.40 = 103,412.40 : x
  2. Step 2: Convert to fraction form
    280,996.80/421,349.40 = 103,412.40/x
  3. Step 3: Cross multiply
    280,996.80x = 421,349.40 × 103,412.40
  4. Step 4: Simplify right side
    280,996.80x = 43,572,752,692.56
  5. Step 5: Solve for x
    x = 43,572,752,692.56/280,996.80
  6. Step 6: Final answer
    x = 155,064.94

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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.