Home / 458,195.72-687,017.40-205,430.52

Finding the Fourth Proportional to 458,195.72, 687,017.40 and 205,430.52

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Solution

The fourth proportional to 458,195.72, 687,017.40 and 205,430.52 is: 308,021.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,195.72 : 687,017.40 = 205,430.52 : x
  2. Step 2: Convert to fraction form
    458,195.72/687,017.40 = 205,430.52/x
  3. Step 3: Cross multiply
    458,195.72x = 687,017.40 × 205,430.52
  4. Step 4: Simplify right side
    458,195.72x = 141,134,341,731.05
  5. Step 5: Solve for x
    x = 141,134,341,731.05/458,195.72
  6. Step 6: Final answer
    x = 308,021.96

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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.