Home / 428,438.07-591,221.77-247,139.21

Finding the Fourth Proportional to 428,438.07, 591,221.77 and 247,139.21

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Solution

The fourth proportional to 428,438.07, 591,221.77 and 247,139.21 is: 341,038.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,438.07 : 591,221.77 = 247,139.21 : x
  2. Step 2: Convert to fraction form
    428,438.07/591,221.77 = 247,139.21/x
  3. Step 3: Cross multiply
    428,438.07x = 591,221.77 × 247,139.21
  4. Step 4: Simplify right side
    428,438.07x = 146,114,082,032.81
  5. Step 5: Solve for x
    x = 146,114,082,032.81/428,438.07
  6. Step 6: Final answer
    x = 341,038.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.