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Finding the Fourth Proportional to 499,017.20, 688,643.70 and 272,662.70

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Solution

The fourth proportional to 499,017.20, 688,643.70 and 272,662.70 is: 376,274.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,017.20 : 688,643.70 = 272,662.70 : x
  2. Step 2: Convert to fraction form
    499,017.20/688,643.70 = 272,662.70/x
  3. Step 3: Cross multiply
    499,017.20x = 688,643.70 × 272,662.70
  4. Step 4: Simplify right side
    499,017.20x = 187,767,450,579.99
  5. Step 5: Solve for x
    x = 187,767,450,579.99/499,017.20
  6. Step 6: Final answer
    x = 376,274.51

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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.