Home / 428,849.60-643,274.40-148,337.60

Finding the Fourth Proportional to 428,849.60, 643,274.40 and 148,337.60

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Solution

The fourth proportional to 428,849.60, 643,274.40 and 148,337.60 is: 222,506.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,849.60 : 643,274.40 = 148,337.60 : x
  2. Step 2: Convert to fraction form
    428,849.60/643,274.40 = 148,337.60/x
  3. Step 3: Cross multiply
    428,849.60x = 643,274.40 × 148,337.60
  4. Step 4: Simplify right side
    428,849.60x = 95,421,780,637.44
  5. Step 5: Solve for x
    x = 95,421,780,637.44/428,849.60
  6. Step 6: Final answer
    x = 222,506.40

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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.