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Finding the Fourth Proportional to 415,340.60, 623,010.90 and 309,052.40

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Solution

The fourth proportional to 415,340.60, 623,010.90 and 309,052.40 is: 463,578.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,340.60 : 623,010.90 = 309,052.40 : x
  2. Step 2: Convert to fraction form
    415,340.60/623,010.90 = 309,052.40/x
  3. Step 3: Cross multiply
    415,340.60x = 623,010.90 × 309,052.40
  4. Step 4: Simplify right side
    415,340.60x = 192,543,013,871.16
  5. Step 5: Solve for x
    x = 192,543,013,871.16/415,340.60
  6. Step 6: Final answer
    x = 463,578.60

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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.