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Finding the Fourth Proportional to 315,477.44, 435,361.12 and 172,240.32

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Solution

The fourth proportional to 315,477.44, 435,361.12 and 172,240.32 is: 237,692.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,477.44 : 435,361.12 = 172,240.32 : x
  2. Step 2: Convert to fraction form
    315,477.44/435,361.12 = 172,240.32/x
  3. Step 3: Cross multiply
    315,477.44x = 435,361.12 × 172,240.32
  4. Step 4: Simplify right side
    315,477.44x = 74,986,738,624.36
  5. Step 5: Solve for x
    x = 74,986,738,624.36/315,477.44
  6. Step 6: Final answer
    x = 237,692.87

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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.