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Finding the Fourth Proportional to 415,075.60, 622,807.80 and 215,621.20

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Solution

The fourth proportional to 415,075.60, 622,807.80 and 215,621.20 is: 323,532.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,075.60 : 622,807.80 = 215,621.20 : x
  2. Step 2: Convert to fraction form
    415,075.60/622,807.80 = 215,621.20/x
  3. Step 3: Cross multiply
    415,075.60x = 622,807.80 × 215,621.20
  4. Step 4: Simplify right side
    415,075.60x = 134,290,565,205.36
  5. Step 5: Solve for x
    x = 134,290,565,205.36/415,075.60
  6. Step 6: Final answer
    x = 323,532.79

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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.