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Finding the Fourth Proportional to 421,989.72, 632,547.18 and 263,855.04

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Solution

The fourth proportional to 421,989.72, 632,547.18 and 263,855.04 is: 395,509.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,989.72 : 632,547.18 = 263,855.04 : x
  2. Step 2: Convert to fraction form
    421,989.72/632,547.18 = 263,855.04/x
  3. Step 3: Cross multiply
    421,989.72x = 632,547.18 × 263,855.04
  4. Step 4: Simplify right side
    421,989.72x = 166,900,761,480.79
  5. Step 5: Solve for x
    x = 166,900,761,480.79/421,989.72
  6. Step 6: Final answer
    x = 395,509.07

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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.