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Finding the Fourth Proportional to 492,798.72, 680,054.40 and 277,939.20

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Solution

The fourth proportional to 492,798.72, 680,054.40 and 277,939.20 is: 383,551.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,798.72 : 680,054.40 = 277,939.20 : x
  2. Step 2: Convert to fraction form
    492,798.72/680,054.40 = 277,939.20/x
  3. Step 3: Cross multiply
    492,798.72x = 680,054.40 × 277,939.20
  4. Step 4: Simplify right side
    492,798.72x = 189,013,775,892.48
  5. Step 5: Solve for x
    x = 189,013,775,892.48/492,798.72
  6. Step 6: Final answer
    x = 383,551.68

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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.