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Finding the Fourth Proportional to 399,687.44, 551,307.48 and 256,220.24

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Solution

The fourth proportional to 399,687.44, 551,307.48 and 256,220.24 is: 353,416.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,687.44 : 551,307.48 = 256,220.24 : x
  2. Step 2: Convert to fraction form
    399,687.44/551,307.48 = 256,220.24/x
  3. Step 3: Cross multiply
    399,687.44x = 551,307.48 × 256,220.24
  4. Step 4: Simplify right side
    399,687.44x = 141,256,134,839.40
  5. Step 5: Solve for x
    x = 141,256,134,839.40/399,687.44
  6. Step 6: Final answer
    x = 353,416.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.