Home / 440,743.32-660,089.52-428,621.40

Finding the Fourth Proportional to 440,743.32, 660,089.52 and 428,621.40

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Solution

The fourth proportional to 440,743.32, 660,089.52 and 428,621.40 is: 641,934.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,743.32 : 660,089.52 = 428,621.40 : x
  2. Step 2: Convert to fraction form
    440,743.32/660,089.52 = 428,621.40/x
  3. Step 3: Cross multiply
    440,743.32x = 660,089.52 × 428,621.40
  4. Step 4: Simplify right side
    440,743.32x = 282,928,494,187.73
  5. Step 5: Solve for x
    x = 282,928,494,187.73/440,743.32
  6. Step 6: Final answer
    x = 641,934.84

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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.