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Finding the Fourth Proportional to 421,622.70, 632,215.35 and 155,246.10

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Solution

The fourth proportional to 421,622.70, 632,215.35 and 155,246.10 is: 232,788.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,622.70 : 632,215.35 = 155,246.10 : x
  2. Step 2: Convert to fraction form
    421,622.70/632,215.35 = 155,246.10/x
  3. Step 3: Cross multiply
    421,622.70x = 632,215.35 × 155,246.10
  4. Step 4: Simplify right side
    421,622.70x = 98,148,967,447.64
  5. Step 5: Solve for x
    x = 98,148,967,447.64/421,622.70
  6. Step 6: Final answer
    x = 232,788.62

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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.