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Finding the Fourth Proportional to 681,421.16, 940,367.49 and 375,508.49

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Solution

The fourth proportional to 681,421.16, 940,367.49 and 375,508.49 is: 518,205.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,421.16 : 940,367.49 = 375,508.49 : x
  2. Step 2: Convert to fraction form
    681,421.16/940,367.49 = 375,508.49/x
  3. Step 3: Cross multiply
    681,421.16x = 940,367.49 × 375,508.49
  4. Step 4: Simplify right side
    681,421.16x = 353,115,971,513.15
  5. Step 5: Solve for x
    x = 353,115,971,513.15/681,421.16
  6. Step 6: Final answer
    x = 518,205.18

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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.