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Finding the Fourth Proportional to 310,114.08, 428,004.27 and 189,325.80

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Solution

The fourth proportional to 310,114.08, 428,004.27 and 189,325.80 is: 261,298.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,114.08 : 428,004.27 = 189,325.80 : x
  2. Step 2: Convert to fraction form
    310,114.08/428,004.27 = 189,325.80/x
  3. Step 3: Cross multiply
    310,114.08x = 428,004.27 × 189,325.80
  4. Step 4: Simplify right side
    310,114.08x = 81,032,250,821.17
  5. Step 5: Solve for x
    x = 81,032,250,821.17/310,114.08
  6. Step 6: Final answer
    x = 261,298.20

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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.