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Finding the Fourth Proportional to 340,498.80, 510,748.20 and 288,010.80

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Solution

The fourth proportional to 340,498.80, 510,748.20 and 288,010.80 is: 432,016.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,498.80 : 510,748.20 = 288,010.80 : x
  2. Step 2: Convert to fraction form
    340,498.80/510,748.20 = 288,010.80/x
  3. Step 3: Cross multiply
    340,498.80x = 510,748.20 × 288,010.80
  4. Step 4: Simplify right side
    340,498.80x = 147,100,997,680.56
  5. Step 5: Solve for x
    x = 147,100,997,680.56/340,498.80
  6. Step 6: Final answer
    x = 432,016.20

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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.