Home / 428,327.47-642,492.69-108,479.26

Finding the Fourth Proportional to 428,327.47, 642,492.69 and 108,479.26

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Solution

The fourth proportional to 428,327.47, 642,492.69 and 108,479.26 is: 162,719.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,327.47 : 642,492.69 = 108,479.26 : x
  2. Step 2: Convert to fraction form
    428,327.47/642,492.69 = 108,479.26/x
  3. Step 3: Cross multiply
    428,327.47x = 642,492.69 × 108,479.26
  4. Step 4: Simplify right side
    428,327.47x = 69,697,131,566.61
  5. Step 5: Solve for x
    x = 69,697,131,566.61/428,327.47
  6. Step 6: Final answer
    x = 162,719.27

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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.