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Finding the Fourth Proportional to 387,492.33, 534,722.67 and 215,409.90

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Solution

The fourth proportional to 387,492.33, 534,722.67 and 215,409.90 is: 297,256.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,492.33 : 534,722.67 = 215,409.90 : x
  2. Step 2: Convert to fraction form
    387,492.33/534,722.67 = 215,409.90/x
  3. Step 3: Cross multiply
    387,492.33x = 534,722.67 × 215,409.90
  4. Step 4: Simplify right side
    387,492.33x = 115,184,556,872.43
  5. Step 5: Solve for x
    x = 115,184,556,872.43/387,492.33
  6. Step 6: Final answer
    x = 297,256.35

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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.