Home / 428,214.80-642,285.75-175,423.12

Finding the Fourth Proportional to 428,214.80, 642,285.75 and 175,423.12

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Solution

The fourth proportional to 428,214.80, 642,285.75 and 175,423.12 is: 263,119.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,214.80 : 642,285.75 = 175,423.12 : x
  2. Step 2: Convert to fraction form
    428,214.80/642,285.75 = 175,423.12/x
  3. Step 3: Cross multiply
    428,214.80x = 642,285.75 × 175,423.12
  4. Step 4: Simplify right side
    428,214.80x = 112,671,769,248.66
  5. Step 5: Solve for x
    x = 112,671,769,248.66/428,214.80
  6. Step 6: Final answer
    x = 263,119.74

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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.