Home / 642,383.08-886,298.34-387,629.80

Finding the Fourth Proportional to 642,383.08, 886,298.34 and 387,629.80

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Solution

The fourth proportional to 642,383.08, 886,298.34 and 387,629.80 is: 534,814.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,383.08 : 886,298.34 = 387,629.80 : x
  2. Step 2: Convert to fraction form
    642,383.08/886,298.34 = 387,629.80/x
  3. Step 3: Cross multiply
    642,383.08x = 886,298.34 × 387,629.80
  4. Step 4: Simplify right side
    642,383.08x = 343,555,648,274.53
  5. Step 5: Solve for x
    x = 343,555,648,274.53/642,383.08
  6. Step 6: Final answer
    x = 534,814.29

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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.