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Finding the Fourth Proportional to 307,271.20, 460,906.80 and 85,655.20

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Solution

The fourth proportional to 307,271.20, 460,906.80 and 85,655.20 is: 128,482.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,271.20 : 460,906.80 = 85,655.20 : x
  2. Step 2: Convert to fraction form
    307,271.20/460,906.80 = 85,655.20/x
  3. Step 3: Cross multiply
    307,271.20x = 460,906.80 × 85,655.20
  4. Step 4: Simplify right side
    307,271.20x = 39,479,064,135.36
  5. Step 5: Solve for x
    x = 39,479,064,135.36/307,271.20
  6. Step 6: Final answer
    x = 128,482.80

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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.