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Finding the Fourth Proportional to 418,963.98, 628,437.46 and 103,423.62

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Solution

The fourth proportional to 418,963.98, 628,437.46 and 103,423.62 is: 155,133.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,963.98 : 628,437.46 = 103,423.62 : x
  2. Step 2: Convert to fraction form
    418,963.98/628,437.46 = 103,423.62/x
  3. Step 3: Cross multiply
    418,963.98x = 628,437.46 × 103,423.62
  4. Step 4: Simplify right side
    418,963.98x = 64,995,277,056.81
  5. Step 5: Solve for x
    x = 64,995,277,056.81/418,963.98
  6. Step 6: Final answer
    x = 155,133.33

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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.