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Finding the Fourth Proportional to 520,081.30, 778,955.55 and 426,769.30

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Solution

The fourth proportional to 520,081.30, 778,955.55 and 426,769.30 is: 639,196.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,081.30 : 778,955.55 = 426,769.30 : x
  2. Step 2: Convert to fraction form
    520,081.30/778,955.55 = 426,769.30/x
  3. Step 3: Cross multiply
    520,081.30x = 778,955.55 × 426,769.30
  4. Step 4: Simplify right side
    520,081.30x = 332,434,314,804.62
  5. Step 5: Solve for x
    x = 332,434,314,804.62/520,081.30
  6. Step 6: Final answer
    x = 639,196.82

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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.