Home / 428,765.04-643,153-162,454.02

Finding the Fourth Proportional to 428,765.04, 643,153 and 162,454.02

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Solution

The fourth proportional to 428,765.04, 643,153 and 162,454.02 is: 243,683.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,765.04 : 643,153 = 162,454.02 : x
  2. Step 2: Convert to fraction form
    428,765.04/643,153 = 162,454.02/x
  3. Step 3: Cross multiply
    428,765.04x = 643,153 × 162,454.02
  4. Step 4: Simplify right side
    428,765.04x = 104,482,790,325.06
  5. Step 5: Solve for x
    x = 104,482,790,325.06/428,765.04
  6. Step 6: Final answer
    x = 243,683.09

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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.