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Finding the Fourth Proportional to 605,356.20, 908,034.30 and 392,779.80

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Solution

The fourth proportional to 605,356.20, 908,034.30 and 392,779.80 is: 589,169.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,356.20 : 908,034.30 = 392,779.80 : x
  2. Step 2: Convert to fraction form
    605,356.20/908,034.30 = 392,779.80/x
  3. Step 3: Cross multiply
    605,356.20x = 908,034.30 × 392,779.80
  4. Step 4: Simplify right side
    605,356.20x = 356,657,530,747.14
  5. Step 5: Solve for x
    x = 356,657,530,747.14/605,356.20
  6. Step 6: Final answer
    x = 589,169.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.