Home / 664,615.23-917,128.63-392,618.04

Finding the Fourth Proportional to 664,615.23, 917,128.63 and 392,618.04

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Solution

The fourth proportional to 664,615.23, 917,128.63 and 392,618.04 is: 541,789.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,615.23 : 917,128.63 = 392,618.04 : x
  2. Step 2: Convert to fraction form
    664,615.23/917,128.63 = 392,618.04/x
  3. Step 3: Cross multiply
    664,615.23x = 917,128.63 × 392,618.04
  4. Step 4: Simplify right side
    664,615.23x = 360,081,239,981.55
  5. Step 5: Solve for x
    x = 360,081,239,981.55/664,615.23
  6. Step 6: Final answer
    x = 541,789.03

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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.