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Finding the Fourth Proportional to 355,393.89, 490,456.76 and 194,259.78

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Solution

The fourth proportional to 355,393.89, 490,456.76 and 194,259.78 is: 268,085.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,393.89 : 490,456.76 = 194,259.78 : x
  2. Step 2: Convert to fraction form
    355,393.89/490,456.76 = 194,259.78/x
  3. Step 3: Cross multiply
    355,393.89x = 490,456.76 × 194,259.78
  4. Step 4: Simplify right side
    355,393.89x = 95,276,021,325.81
  5. Step 5: Solve for x
    x = 95,276,021,325.81/355,393.89
  6. Step 6: Final answer
    x = 268,085.70

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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.