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Finding the Fourth Proportional to 316,380.85, 436,809.33 and 282,330.77

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Solution

The fourth proportional to 316,380.85, 436,809.33 and 282,330.77 is: 389,798.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,380.85 : 436,809.33 = 282,330.77 : x
  2. Step 2: Convert to fraction form
    316,380.85/436,809.33 = 282,330.77/x
  3. Step 3: Cross multiply
    316,380.85x = 436,809.33 × 282,330.77
  4. Step 4: Simplify right side
    316,380.85x = 123,324,717,178.86
  5. Step 5: Solve for x
    x = 123,324,717,178.86/316,380.85
  6. Step 6: Final answer
    x = 389,798.31

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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.