Home / 428,895.30-643,148.55-162,567.30

Finding the Fourth Proportional to 428,895.30, 643,148.55 and 162,567.30

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Solution

The fourth proportional to 428,895.30, 643,148.55 and 162,567.30 is: 243,777.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,895.30 : 643,148.55 = 162,567.30 : x
  2. Step 2: Convert to fraction form
    428,895.30/643,148.55 = 162,567.30/x
  3. Step 3: Cross multiply
    428,895.30x = 643,148.55 × 162,567.30
  4. Step 4: Simplify right side
    428,895.30x = 104,554,923,272.42
  5. Step 5: Solve for x
    x = 104,554,923,272.42/428,895.30
  6. Step 6: Final answer
    x = 243,777.27

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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.