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Finding the Fourth Proportional to 387,705.36, 534,968.19 and 215,600.76

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Solution

The fourth proportional to 387,705.36, 534,968.19 and 215,600.76 is: 297,492.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,705.36 : 534,968.19 = 215,600.76 : x
  2. Step 2: Convert to fraction form
    387,705.36/534,968.19 = 215,600.76/x
  3. Step 3: Cross multiply
    387,705.36x = 534,968.19 × 215,600.76
  4. Step 4: Simplify right side
    387,705.36x = 115,339,548,339.82
  5. Step 5: Solve for x
    x = 115,339,548,339.82/387,705.36
  6. Step 6: Final answer
    x = 297,492.79

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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.