Home / 428,778.76-591,985.74-275,888.04

Finding the Fourth Proportional to 428,778.76, 591,985.74 and 275,888.04

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Solution

The fourth proportional to 428,778.76, 591,985.74 and 275,888.04 is: 380,899.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,778.76 : 591,985.74 = 275,888.04 : x
  2. Step 2: Convert to fraction form
    428,778.76/591,985.74 = 275,888.04/x
  3. Step 3: Cross multiply
    428,778.76x = 591,985.74 × 275,888.04
  4. Step 4: Simplify right side
    428,778.76x = 163,321,785,516.55
  5. Step 5: Solve for x
    x = 163,321,785,516.55/428,778.76
  6. Step 6: Final answer
    x = 380,899.90

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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.