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Finding the Fourth Proportional to 343,679.60, 515,519.40 and 338,430.80

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Solution

The fourth proportional to 343,679.60, 515,519.40 and 338,430.80 is: 507,646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,679.60 : 515,519.40 = 338,430.80 : x
  2. Step 2: Convert to fraction form
    343,679.60/515,519.40 = 338,430.80/x
  3. Step 3: Cross multiply
    343,679.60x = 515,519.40 × 338,430.80
  4. Step 4: Simplify right side
    343,679.60x = 174,467,642,957.52
  5. Step 5: Solve for x
    x = 174,467,642,957.52/343,679.60
  6. Step 6: Final answer
    x = 507,646.20

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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.