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Finding the Fourth Proportional to 423,766.98, 635,651.40 and 103,920.18

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Solution

The fourth proportional to 423,766.98, 635,651.40 and 103,920.18 is: 155,880.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,766.98 : 635,651.40 = 103,920.18 : x
  2. Step 2: Convert to fraction form
    423,766.98/635,651.40 = 103,920.18/x
  3. Step 3: Cross multiply
    423,766.98x = 635,651.40 × 103,920.18
  4. Step 4: Simplify right side
    423,766.98x = 66,057,007,905.25
  5. Step 5: Solve for x
    x = 66,057,007,905.25/423,766.98
  6. Step 6: Final answer
    x = 155,880.50

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1.5x scale

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.