Home / 428,685.08-643,135.74-302,571.64

Finding the Fourth Proportional to 428,685.08, 643,135.74 and 302,571.64

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Solution

The fourth proportional to 428,685.08, 643,135.74 and 302,571.64 is: 453,933.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,685.08 : 643,135.74 = 302,571.64 : x
  2. Step 2: Convert to fraction form
    428,685.08/643,135.74 = 302,571.64/x
  3. Step 3: Cross multiply
    428,685.08x = 643,135.74 × 302,571.64
  4. Step 4: Simplify right side
    428,685.08x = 194,594,635,594.41
  5. Step 5: Solve for x
    x = 194,594,635,594.41/428,685.08
  6. Step 6: Final answer
    x = 453,933.77

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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.