Home / 402,746.10-605,431.35-285,231.30

Finding the Fourth Proportional to 402,746.10, 605,431.35 and 285,231.30

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Solution

The fourth proportional to 402,746.10, 605,431.35 and 285,231.30 is: 428,776.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,746.10 : 605,431.35 = 285,231.30 : x
  2. Step 2: Convert to fraction form
    402,746.10/605,431.35 = 285,231.30/x
  3. Step 3: Cross multiply
    402,746.10x = 605,431.35 × 285,231.30
  4. Step 4: Simplify right side
    402,746.10x = 172,687,971,021.26
  5. Step 5: Solve for x
    x = 172,687,971,021.26/402,746.10
  6. Step 6: Final answer
    x = 428,776.27

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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.