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Finding the Fourth Proportional to 510,116.20, 765,203.10 and 155,141.80

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Solution

The fourth proportional to 510,116.20, 765,203.10 and 155,141.80 is: 232,721.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,116.20 : 765,203.10 = 155,141.80 : x
  2. Step 2: Convert to fraction form
    510,116.20/765,203.10 = 155,141.80/x
  3. Step 3: Cross multiply
    510,116.20x = 765,203.10 × 155,141.80
  4. Step 4: Simplify right side
    510,116.20x = 118,714,986,299.58
  5. Step 5: Solve for x
    x = 118,714,986,299.58/510,116.20
  6. Step 6: Final answer
    x = 232,721.46

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1.5x scale

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.