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Finding the Fourth Proportional to 270,534.27, 405,683.85 and 128,420.27

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Solution

The fourth proportional to 270,534.27, 405,683.85 and 128,420.27 is: 192,574.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,534.27 : 405,683.85 = 128,420.27 : x
  2. Step 2: Convert to fraction form
    270,534.27/405,683.85 = 128,420.27/x
  3. Step 3: Cross multiply
    270,534.27x = 405,683.85 × 128,420.27
  4. Step 4: Simplify right side
    270,534.27x = 52,098,029,551.64
  5. Step 5: Solve for x
    x = 52,098,029,551.64/270,534.27
  6. Step 6: Final answer
    x = 192,574.60

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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.