Home / 861,508.51-1,292,263.07-387,640.28

Finding the Fourth Proportional to 861,508.51, 1,292,263.07 and 387,640.28

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Solution

The fourth proportional to 861,508.51, 1,292,263.07 and 387,640.28 is: 581,460.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,508.51 : 1,292,263.07 = 387,640.28 : x
  2. Step 2: Convert to fraction form
    861,508.51/1,292,263.07 = 387,640.28/x
  3. Step 3: Cross multiply
    861,508.51x = 1,292,263.07 × 387,640.28
  4. Step 4: Simplify right side
    861,508.51x = 500,933,219,580.92
  5. Step 5: Solve for x
    x = 500,933,219,580.92/861,508.51
  6. Step 6: Final answer
    x = 581,460.56

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Double scale
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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.