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Finding the Fourth Proportional to 343,359.80, 515,039.70 and 143,613.80

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Solution

The fourth proportional to 343,359.80, 515,039.70 and 143,613.80 is: 215,420.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,359.80 : 515,039.70 = 143,613.80 : x
  2. Step 2: Convert to fraction form
    343,359.80/515,039.70 = 143,613.80/x
  3. Step 3: Cross multiply
    343,359.80x = 515,039.70 × 143,613.80
  4. Step 4: Simplify right side
    343,359.80x = 73,966,808,467.86
  5. Step 5: Solve for x
    x = 73,966,808,467.86/343,359.80
  6. Step 6: Final answer
    x = 215,420.70

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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.