Home / 428,914.60-643,527.90-148,460.20

Finding the Fourth Proportional to 428,914.60, 643,527.90 and 148,460.20

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Solution

The fourth proportional to 428,914.60, 643,527.90 and 148,460.20 is: 222,744.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,914.60 : 643,527.90 = 148,460.20 : x
  2. Step 2: Convert to fraction form
    428,914.60/643,527.90 = 148,460.20/x
  3. Step 3: Cross multiply
    428,914.60x = 643,527.90 × 148,460.20
  4. Step 4: Simplify right side
    428,914.60x = 95,538,280,739.58
  5. Step 5: Solve for x
    x = 95,538,280,739.58/428,914.60
  6. Step 6: Final answer
    x = 222,744.30

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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.