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Finding the Fourth Proportional to 420,361.20, 580,075.56 and 239,048.64

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Solution

The fourth proportional to 420,361.20, 580,075.56 and 239,048.64 is: 329,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,361.20 : 580,075.56 = 239,048.64 : x
  2. Step 2: Convert to fraction form
    420,361.20/580,075.56 = 239,048.64/x
  3. Step 3: Cross multiply
    420,361.20x = 580,075.56 × 239,048.64
  4. Step 4: Simplify right side
    420,361.20x = 138,666,273,715.24
  5. Step 5: Solve for x
    x = 138,666,273,715.24/420,361.20
  6. Step 6: Final answer
    x = 329,874.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.