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Finding the Fourth Proportional to 307,555.80, 461,333.70 and 85,939.80

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Solution

The fourth proportional to 307,555.80, 461,333.70 and 85,939.80 is: 128,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,555.80 : 461,333.70 = 85,939.80 : x
  2. Step 2: Convert to fraction form
    307,555.80/461,333.70 = 85,939.80/x
  3. Step 3: Cross multiply
    307,555.80x = 461,333.70 × 85,939.80
  4. Step 4: Simplify right side
    307,555.80x = 39,646,925,911.26
  5. Step 5: Solve for x
    x = 39,646,925,911.26/307,555.80
  6. Step 6: Final answer
    x = 128,909.70

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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.