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Finding the Fourth Proportional to 387,392, 534,630.12 and 236,518.16

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Solution

The fourth proportional to 387,392, 534,630.12 and 236,518.16 is: 326,412.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,392 : 534,630.12 = 236,518.16 : x
  2. Step 2: Convert to fraction form
    387,392/534,630.12 = 236,518.16/x
  3. Step 3: Cross multiply
    387,392x = 534,630.12 × 236,518.16
  4. Step 4: Simplify right side
    387,392x = 126,449,732,262.98
  5. Step 5: Solve for x
    x = 126,449,732,262.98/387,392
  6. Step 6: Final answer
    x = 326,412.86

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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.