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Finding the Fourth Proportional to 423,388.40, 634,564.20 and 186,479.60

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Solution

The fourth proportional to 423,388.40, 634,564.20 and 186,479.60 is: 279,491.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,388.40 : 634,564.20 = 186,479.60 : x
  2. Step 2: Convert to fraction form
    423,388.40/634,564.20 = 186,479.60/x
  3. Step 3: Cross multiply
    423,388.40x = 634,564.20 × 186,479.60
  4. Step 4: Simplify right side
    423,388.40x = 118,333,278,190.32
  5. Step 5: Solve for x
    x = 118,333,278,190.32/423,388.40
  6. Step 6: Final answer
    x = 279,491.07

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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.