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Finding the Fourth Proportional to 387,309.71, 534,550.81 and 322,676.45

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Solution

The fourth proportional to 387,309.71, 534,550.81 and 322,676.45 is: 445,346.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,309.71 : 534,550.81 = 322,676.45 : x
  2. Step 2: Convert to fraction form
    387,309.71/534,550.81 = 322,676.45/x
  3. Step 3: Cross multiply
    387,309.71x = 534,550.81 × 322,676.45
  4. Step 4: Simplify right side
    387,309.71x = 172,486,960,157.21
  5. Step 5: Solve for x
    x = 172,486,960,157.21/387,309.71
  6. Step 6: Final answer
    x = 445,346.34

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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.