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Finding the Fourth Proportional to 307,554.80, 461,332.20 and 85,938.80

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Solution

The fourth proportional to 307,554.80, 461,332.20 and 85,938.80 is: 128,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,554.80 : 461,332.20 = 85,938.80 : x
  2. Step 2: Convert to fraction form
    307,554.80/461,332.20 = 85,938.80/x
  3. Step 3: Cross multiply
    307,554.80x = 461,332.20 × 85,938.80
  4. Step 4: Simplify right side
    307,554.80x = 39,646,335,669.36
  5. Step 5: Solve for x
    x = 39,646,335,669.36/307,554.80
  6. Step 6: Final answer
    x = 128,908.20

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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.