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Finding the Fourth Proportional to 420,937.99, 631,656.10 and 154,885.34

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Solution

The fourth proportional to 420,937.99, 631,656.10 and 154,885.34 is: 232,419.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,937.99 : 631,656.10 = 154,885.34 : x
  2. Step 2: Convert to fraction form
    420,937.99/631,656.10 = 154,885.34/x
  3. Step 3: Cross multiply
    420,937.99x = 631,656.10 × 154,885.34
  4. Step 4: Simplify right side
    420,937.99x = 97,834,269,372.17
  5. Step 5: Solve for x
    x = 97,834,269,372.17/420,937.99
  6. Step 6: Final answer
    x = 232,419.67

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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.