Home / 428,290.67-591,041.07-256,215.89

Finding the Fourth Proportional to 428,290.67, 591,041.07 and 256,215.89

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Solution

The fourth proportional to 428,290.67, 591,041.07 and 256,215.89 is: 353,577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,290.67 : 591,041.07 = 256,215.89 : x
  2. Step 2: Convert to fraction form
    428,290.67/591,041.07 = 256,215.89/x
  3. Step 3: Cross multiply
    428,290.67x = 591,041.07 × 256,215.89
  4. Step 4: Simplify right side
    428,290.67x = 151,434,115,254.21
  5. Step 5: Solve for x
    x = 151,434,115,254.21/428,290.67
  6. Step 6: Final answer
    x = 353,577.90

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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.