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Finding the Fourth Proportional to 437,920.20, 656,880.30 and 402,490.80

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Solution

The fourth proportional to 437,920.20, 656,880.30 and 402,490.80 is: 603,736.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,920.20 : 656,880.30 = 402,490.80 : x
  2. Step 2: Convert to fraction form
    437,920.20/656,880.30 = 402,490.80/x
  3. Step 3: Cross multiply
    437,920.20x = 656,880.30 × 402,490.80
  4. Step 4: Simplify right side
    437,920.20x = 264,388,277,451.24
  5. Step 5: Solve for x
    x = 264,388,277,451.24/437,920.20
  6. Step 6: Final answer
    x = 603,736.20

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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.