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Finding the Fourth Proportional to 387,403, 534,645.30 and 236,529.16

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Solution

The fourth proportional to 387,403, 534,645.30 and 236,529.16 is: 326,428.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,403 : 534,645.30 = 236,529.16 : x
  2. Step 2: Convert to fraction form
    387,403/534,645.30 = 236,529.16/x
  3. Step 3: Cross multiply
    387,403x = 534,645.30 × 236,529.16
  4. Step 4: Simplify right side
    387,403x = 126,459,203,706.95
  5. Step 5: Solve for x
    x = 126,459,203,706.95/387,403
  6. Step 6: Final answer
    x = 326,428.04

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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.