Home / 428,051.20-641,925.60-147,503.20

Finding the Fourth Proportional to 428,051.20, 641,925.60 and 147,503.20

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Solution

The fourth proportional to 428,051.20, 641,925.60 and 147,503.20 is: 221,202.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,051.20 : 641,925.60 = 147,503.20 : x
  2. Step 2: Convert to fraction form
    428,051.20/641,925.60 = 147,503.20/x
  3. Step 3: Cross multiply
    428,051.20x = 641,925.60 × 147,503.20
  4. Step 4: Simplify right side
    428,051.20x = 94,686,080,161.92
  5. Step 5: Solve for x
    x = 94,686,080,161.92/428,051.20
  6. Step 6: Final answer
    x = 221,202.70

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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.