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Finding the Fourth Proportional to 826,405.40, 1,237,242.90 and 508,723.40

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Solution

The fourth proportional to 826,405.40, 1,237,242.90 and 508,723.40 is: 761,629.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,405.40 : 1,237,242.90 = 508,723.40 : x
  2. Step 2: Convert to fraction form
    826,405.40/1,237,242.90 = 508,723.40/x
  3. Step 3: Cross multiply
    826,405.40x = 1,237,242.90 × 508,723.40
  4. Step 4: Simplify right side
    826,405.40x = 629,414,414,713.86
  5. Step 5: Solve for x
    x = 629,414,414,713.86/826,405.40
  6. Step 6: Final answer
    x = 761,629.12

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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.