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Finding the Fourth Proportional to 405,092.80, 607,639.20 and 310,614.40

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Solution

The fourth proportional to 405,092.80, 607,639.20 and 310,614.40 is: 465,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,092.80 : 607,639.20 = 310,614.40 : x
  2. Step 2: Convert to fraction form
    405,092.80/607,639.20 = 310,614.40/x
  3. Step 3: Cross multiply
    405,092.80x = 607,639.20 × 310,614.40
  4. Step 4: Simplify right side
    405,092.80x = 188,741,485,524.48
  5. Step 5: Solve for x
    x = 188,741,485,524.48/405,092.80
  6. Step 6: Final answer
    x = 465,921.60

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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.