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Finding the Fourth Proportional to 421,101.84, 581,155.08 and 239,870.54

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Solution

The fourth proportional to 421,101.84, 581,155.08 and 239,870.54 is: 331,041.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,101.84 : 581,155.08 = 239,870.54 : x
  2. Step 2: Convert to fraction form
    421,101.84/581,155.08 = 239,870.54/x
  3. Step 3: Cross multiply
    421,101.84x = 581,155.08 × 239,870.54
  4. Step 4: Simplify right side
    421,101.84x = 139,401,982,863.34
  5. Step 5: Solve for x
    x = 139,401,982,863.34/421,101.84
  6. Step 6: Final answer
    x = 331,041.02

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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.