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Finding the Fourth Proportional to 380,075.20, 570,112.80 and 374,170.30

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Solution

The fourth proportional to 380,075.20, 570,112.80 and 374,170.30 is: 561,255.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,075.20 : 570,112.80 = 374,170.30 : x
  2. Step 2: Convert to fraction form
    380,075.20/570,112.80 = 374,170.30/x
  3. Step 3: Cross multiply
    380,075.20x = 570,112.80 × 374,170.30
  4. Step 4: Simplify right side
    380,075.20x = 213,319,277,409.84
  5. Step 5: Solve for x
    x = 213,319,277,409.84/380,075.20
  6. Step 6: Final answer
    x = 561,255.45

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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.