Home / 646,918.40-970,723.20-291,987.20

Finding the Fourth Proportional to 646,918.40, 970,723.20 and 291,987.20

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Solution

The fourth proportional to 646,918.40, 970,723.20 and 291,987.20 is: 438,136.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,918.40 : 970,723.20 = 291,987.20 : x
  2. Step 2: Convert to fraction form
    646,918.40/970,723.20 = 291,987.20/x
  3. Step 3: Cross multiply
    646,918.40x = 970,723.20 × 291,987.20
  4. Step 4: Simplify right side
    646,918.40x = 283,438,749,143.04
  5. Step 5: Solve for x
    x = 283,438,749,143.04/646,918.40
  6. Step 6: Final answer
    x = 438,136.79

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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.