Home / 500,255.48-690,421.38-306,778.88

Finding the Fourth Proportional to 500,255.48, 690,421.38 and 306,778.88

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Solution

The fourth proportional to 500,255.48, 690,421.38 and 306,778.88 is: 423,397.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,255.48 : 690,421.38 = 306,778.88 : x
  2. Step 2: Convert to fraction form
    500,255.48/690,421.38 = 306,778.88/x
  3. Step 3: Cross multiply
    500,255.48x = 690,421.38 × 306,778.88
  4. Step 4: Simplify right side
    500,255.48x = 211,806,697,684.45
  5. Step 5: Solve for x
    x = 211,806,697,684.45/500,255.48
  6. Step 6: Final answer
    x = 423,397.06

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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.