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Finding the Fourth Proportional to 423,816.40, 635,206.20 and 186,907.60

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Solution

The fourth proportional to 423,816.40, 635,206.20 and 186,907.60 is: 280,132.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,816.40 : 635,206.20 = 186,907.60 : x
  2. Step 2: Convert to fraction form
    423,816.40/635,206.20 = 186,907.60/x
  3. Step 3: Cross multiply
    423,816.40x = 635,206.20 × 186,907.60
  4. Step 4: Simplify right side
    423,816.40x = 118,724,866,347.12
  5. Step 5: Solve for x
    x = 118,724,866,347.12/423,816.40
  6. Step 6: Final answer
    x = 280,132.78

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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.