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Finding the Fourth Proportional to 277,075.20, 415,515.60 and 143,911.20

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Solution

The fourth proportional to 277,075.20, 415,515.60 and 143,911.20 is: 215,816.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    277,075.20 : 415,515.60 = 143,911.20 : x
  2. Step 2: Convert to fraction form
    277,075.20/415,515.60 = 143,911.20/x
  3. Step 3: Cross multiply
    277,075.20x = 415,515.60 × 143,911.20
  4. Step 4: Simplify right side
    277,075.20x = 59,797,348,614.72
  5. Step 5: Solve for x
    x = 59,797,348,614.72/277,075.20
  6. Step 6: Final answer
    x = 215,816.31

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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.