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Finding the Fourth Proportional to 421,873.04, 632,709.84 and 155,488.88

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Solution

The fourth proportional to 421,873.04, 632,709.84 and 155,488.88 is: 233,196.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,873.04 : 632,709.84 = 155,488.88 : x
  2. Step 2: Convert to fraction form
    421,873.04/632,709.84 = 155,488.88/x
  3. Step 3: Cross multiply
    421,873.04x = 632,709.84 × 155,488.88
  4. Step 4: Simplify right side
    421,873.04x = 98,379,344,386.58
  5. Step 5: Solve for x
    x = 98,379,344,386.58/421,873.04
  6. Step 6: Final answer
    x = 233,196.57

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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.