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Finding the Fourth Proportional to 673,866.16, 929,921.40 and 387,383.68

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Solution

The fourth proportional to 673,866.16, 929,921.40 and 387,383.68 is: 534,581.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,866.16 : 929,921.40 = 387,383.68 : x
  2. Step 2: Convert to fraction form
    673,866.16/929,921.40 = 387,383.68/x
  3. Step 3: Cross multiply
    673,866.16x = 929,921.40 × 387,383.68
  4. Step 4: Simplify right side
    673,866.16x = 360,236,374,042.75
  5. Step 5: Solve for x
    x = 360,236,374,042.75/673,866.16
  6. Step 6: Final answer
    x = 534,581.49

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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.