Home / 423,346.25-634,686.45-289,821.80

Finding the Fourth Proportional to 423,346.25, 634,686.45 and 289,821.80

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Solution

The fourth proportional to 423,346.25, 634,686.45 and 289,821.80 is: 434,504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,346.25 : 634,686.45 = 289,821.80 : x
  2. Step 2: Convert to fraction form
    423,346.25/634,686.45 = 289,821.80/x
  3. Step 3: Cross multiply
    423,346.25x = 634,686.45 × 289,821.80
  4. Step 4: Simplify right side
    423,346.25x = 183,945,966,201.18
  5. Step 5: Solve for x
    x = 183,945,966,201.18/423,346.25
  6. Step 6: Final answer
    x = 434,504.78

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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.