Home / 765,978.08-1,057,007.68-421,746.88

Finding the Fourth Proportional to 765,978.08, 1,057,007.68 and 421,746.88

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Solution

The fourth proportional to 765,978.08, 1,057,007.68 and 421,746.88 is: 581,987.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,978.08 : 1,057,007.68 = 421,746.88 : x
  2. Step 2: Convert to fraction form
    765,978.08/1,057,007.68 = 421,746.88/x
  3. Step 3: Cross multiply
    765,978.08x = 1,057,007.68 × 421,746.88
  4. Step 4: Simplify right side
    765,978.08x = 445,789,691,176.04
  5. Step 5: Solve for x
    x = 445,789,691,176.04/765,978.08
  6. Step 6: Final answer
    x = 581,987.53

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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.