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Finding the Fourth Proportional to 520,063.20, 780,094.80 and 268,120.80

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Solution

The fourth proportional to 520,063.20, 780,094.80 and 268,120.80 is: 402,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,063.20 : 780,094.80 = 268,120.80 : x
  2. Step 2: Convert to fraction form
    520,063.20/780,094.80 = 268,120.80/x
  3. Step 3: Cross multiply
    520,063.20x = 780,094.80 × 268,120.80
  4. Step 4: Simplify right side
    520,063.20x = 209,159,641,851.84
  5. Step 5: Solve for x
    x = 209,159,641,851.84/520,063.20
  6. Step 6: Final answer
    x = 402,181.20

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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.