Home / 428,779.22-643,265.86-144,462.04

Finding the Fourth Proportional to 428,779.22, 643,265.86 and 144,462.04

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Solution

The fourth proportional to 428,779.22, 643,265.86 and 144,462.04 is: 216,725.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,779.22 : 643,265.86 = 144,462.04 : x
  2. Step 2: Convert to fraction form
    428,779.22/643,265.86 = 144,462.04/x
  3. Step 3: Cross multiply
    428,779.22x = 643,265.86 × 144,462.04
  4. Step 4: Simplify right side
    428,779.22x = 92,927,496,428.63
  5. Step 5: Solve for x
    x = 92,927,496,428.63/428,779.22
  6. Step 6: Final answer
    x = 216,725.75

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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.