Home / 428,623.28-643,041.83-302,509.86

Finding the Fourth Proportional to 428,623.28, 643,041.83 and 302,509.86

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Solution

The fourth proportional to 428,623.28, 643,041.83 and 302,509.86 is: 453,840.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,623.28 : 643,041.83 = 302,509.86 : x
  2. Step 2: Convert to fraction form
    428,623.28/643,041.83 = 302,509.86/x
  3. Step 3: Cross multiply
    428,623.28x = 643,041.83 × 302,509.86
  4. Step 4: Simplify right side
    428,623.28x = 194,526,493,967.44
  5. Step 5: Solve for x
    x = 194,526,493,967.44/428,623.28
  6. Step 6: Final answer
    x = 453,840.24

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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.