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Finding the Fourth Proportional to 499,407.80, 749,111.70 and 200,031.80

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Solution

The fourth proportional to 499,407.80, 749,111.70 and 200,031.80 is: 300,047.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,407.80 : 749,111.70 = 200,031.80 : x
  2. Step 2: Convert to fraction form
    499,407.80/749,111.70 = 200,031.80/x
  3. Step 3: Cross multiply
    499,407.80x = 749,111.70 × 200,031.80
  4. Step 4: Simplify right side
    499,407.80x = 149,846,161,752.06
  5. Step 5: Solve for x
    x = 149,846,161,752.06/499,407.80
  6. Step 6: Final answer
    x = 300,047.70

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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.