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Finding the Fourth Proportional to 261,483.70, 391,880.89 and 103,626.02

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Solution

The fourth proportional to 261,483.70, 391,880.89 and 103,626.02 is: 155,302.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,483.70 : 391,880.89 = 103,626.02 : x
  2. Step 2: Convert to fraction form
    261,483.70/391,880.89 = 103,626.02/x
  3. Step 3: Cross multiply
    261,483.70x = 391,880.89 × 103,626.02
  4. Step 4: Simplify right side
    261,483.70x = 40,609,056,944.76
  5. Step 5: Solve for x
    x = 40,609,056,944.76/261,483.70
  6. Step 6: Final answer
    x = 155,302.44

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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.