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Finding the Fourth Proportional to 456,490.20, 683,423.10 and 279,343.20

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Solution

The fourth proportional to 456,490.20, 683,423.10 and 279,343.20 is: 418,211.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,490.20 : 683,423.10 = 279,343.20 : x
  2. Step 2: Convert to fraction form
    456,490.20/683,423.10 = 279,343.20/x
  3. Step 3: Cross multiply
    456,490.20x = 683,423.10 × 279,343.20
  4. Step 4: Simplify right side
    456,490.20x = 190,909,595,707.92
  5. Step 5: Solve for x
    x = 190,909,595,707.92/456,490.20
  6. Step 6: Final answer
    x = 418,211.82

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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.