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Finding the Fourth Proportional to 428,526.12, 642,155.64 and 404,562.12

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Solution

The fourth proportional to 428,526.12, 642,155.64 and 404,562.12 is: 606,245.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,526.12 : 642,155.64 = 404,562.12 : x
  2. Step 2: Convert to fraction form
    428,526.12/642,155.64 = 404,562.12/x
  3. Step 3: Cross multiply
    428,526.12x = 642,155.64 × 404,562.12
  4. Step 4: Simplify right side
    428,526.12x = 259,791,847,088.36
  5. Step 5: Solve for x
    x = 259,791,847,088.36/428,526.12
  6. Step 6: Final answer
    x = 606,245.07

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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.