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Finding the Fourth Proportional to 421,004.94, 631,549.92 and 136,683.60

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Solution

The fourth proportional to 421,004.94, 631,549.92 and 136,683.60 is: 205,039.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,004.94 : 631,549.92 = 136,683.60 : x
  2. Step 2: Convert to fraction form
    421,004.94/631,549.92 = 136,683.60/x
  3. Step 3: Cross multiply
    421,004.94x = 631,549.92 × 136,683.60
  4. Step 4: Simplify right side
    421,004.94x = 86,322,516,645.31
  5. Step 5: Solve for x
    x = 86,322,516,645.31/421,004.94
  6. Step 6: Final answer
    x = 205,039.20

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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.