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Finding the Fourth Proportional to 387,351.42, 534,457.37 and 234,385.76

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Solution

The fourth proportional to 387,351.42, 534,457.37 and 234,385.76 is: 323,399.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,351.42 : 534,457.37 = 234,385.76 : x
  2. Step 2: Convert to fraction form
    387,351.42/534,457.37 = 234,385.76/x
  3. Step 3: Cross multiply
    387,351.42x = 534,457.37 × 234,385.76
  4. Step 4: Simplify right side
    387,351.42x = 125,269,193,010.84
  5. Step 5: Solve for x
    x = 125,269,193,010.84/387,351.42
  6. Step 6: Final answer
    x = 323,399.34

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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.