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Finding the Fourth Proportional to 719,279.51, 992,603.68 and 396,987.29

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Solution

The fourth proportional to 719,279.51, 992,603.68 and 396,987.29 is: 547,841.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,279.51 : 992,603.68 = 396,987.29 : x
  2. Step 2: Convert to fraction form
    719,279.51/992,603.68 = 396,987.29/x
  3. Step 3: Cross multiply
    719,279.51x = 992,603.68 × 396,987.29
  4. Step 4: Simplify right side
    719,279.51x = 394,051,042,982.29
  5. Step 5: Solve for x
    x = 394,051,042,982.29/719,279.51
  6. Step 6: Final answer
    x = 547,841.33

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1.5x scale

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.