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Finding the Fourth Proportional to 405,320.96, 608,104.48 and 287,220.80

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Solution

The fourth proportional to 405,320.96, 608,104.48 and 287,220.80 is: 430,918.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,320.96 : 608,104.48 = 287,220.80 : x
  2. Step 2: Convert to fraction form
    405,320.96/608,104.48 = 287,220.80/x
  3. Step 3: Cross multiply
    405,320.96x = 608,104.48 × 287,220.80
  4. Step 4: Simplify right side
    405,320.96x = 174,660,255,229.18
  5. Step 5: Solve for x
    x = 174,660,255,229.18/405,320.96
  6. Step 6: Final answer
    x = 430,918.39

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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.