Home / 405,769.40-607,852.20-355,905.80

Finding the Fourth Proportional to 405,769.40, 607,852.20 and 355,905.80

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Solution

The fourth proportional to 405,769.40, 607,852.20 and 355,905.80 is: 533,155.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,769.40 : 607,852.20 = 355,905.80 : x
  2. Step 2: Convert to fraction form
    405,769.40/607,852.20 = 355,905.80/x
  3. Step 3: Cross multiply
    405,769.40x = 607,852.20 × 355,905.80
  4. Step 4: Simplify right side
    405,769.40x = 216,338,123,522.76
  5. Step 5: Solve for x
    x = 216,338,123,522.76/405,769.40
  6. Step 6: Final answer
    x = 533,155.34

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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.