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Finding the Fourth Proportional to 420,940, 631,659.10 and 154,887.34

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Solution

The fourth proportional to 420,940, 631,659.10 and 154,887.34 is: 232,422.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,940 : 631,659.10 = 154,887.34 : x
  2. Step 2: Convert to fraction form
    420,940/631,659.10 = 154,887.34/x
  3. Step 3: Cross multiply
    420,940x = 631,659.10 × 154,887.34
  4. Step 4: Simplify right side
    420,940x = 97,835,997,785.79
  5. Step 5: Solve for x
    x = 97,835,997,785.79/420,940
  6. Step 6: Final answer
    x = 232,422.67

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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.