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Finding the Fourth Proportional to 538,720.70, 743,439.76 and 297,012.66

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Solution

The fourth proportional to 538,720.70, 743,439.76 and 297,012.66 is: 409,880.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,720.70 : 743,439.76 = 297,012.66 : x
  2. Step 2: Convert to fraction form
    538,720.70/743,439.76 = 297,012.66/x
  3. Step 3: Cross multiply
    538,720.70x = 743,439.76 × 297,012.66
  4. Step 4: Simplify right side
    538,720.70x = 220,811,020,667.36
  5. Step 5: Solve for x
    x = 220,811,020,667.36/538,720.70
  6. Step 6: Final answer
    x = 409,880.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.