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Finding the Fourth Proportional to 436,880.80, 656,012.40 and 319,376.80

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Solution

The fourth proportional to 436,880.80, 656,012.40 and 319,376.80 is: 479,570.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,880.80 : 656,012.40 = 319,376.80 : x
  2. Step 2: Convert to fraction form
    436,880.80/656,012.40 = 319,376.80/x
  3. Step 3: Cross multiply
    436,880.80x = 656,012.40 × 319,376.80
  4. Step 4: Simplify right side
    436,880.80x = 209,515,141,072.32
  5. Step 5: Solve for x
    x = 209,515,141,072.32/436,880.80
  6. Step 6: Final answer
    x = 479,570.49

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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.