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Finding the Fourth Proportional to 499,260.36, 688,943.40 and 308,277

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Solution

The fourth proportional to 499,260.36, 688,943.40 and 308,277 is: 425,400.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,260.36 : 688,943.40 = 308,277 : x
  2. Step 2: Convert to fraction form
    499,260.36/688,943.40 = 308,277/x
  3. Step 3: Cross multiply
    499,260.36x = 688,943.40 × 308,277
  4. Step 4: Simplify right side
    499,260.36x = 212,385,404,521.80
  5. Step 5: Solve for x
    x = 212,385,404,521.80/499,260.36
  6. Step 6: Final answer
    x = 425,400.09

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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.