Home / 826,207.85-1,238,315.16-426,630.80

Finding the Fourth Proportional to 826,207.85, 1,238,315.16 and 426,630.80

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Solution

The fourth proportional to 826,207.85, 1,238,315.16 and 426,630.80 is: 639,431.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,207.85 : 1,238,315.16 = 426,630.80 : x
  2. Step 2: Convert to fraction form
    826,207.85/1,238,315.16 = 426,630.80/x
  3. Step 3: Cross multiply
    826,207.85x = 1,238,315.16 × 426,630.80
  4. Step 4: Simplify right side
    826,207.85x = 528,303,381,171.35
  5. Step 5: Solve for x
    x = 528,303,381,171.35/826,207.85
  6. Step 6: Final answer
    x = 639,431.57

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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.