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Finding the Fourth Proportional to 479,262.10, 718,995.21 and 142,303.72

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Solution

The fourth proportional to 479,262.10, 718,995.21 and 142,303.72 is: 213,485.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,262.10 : 718,995.21 = 142,303.72 : x
  2. Step 2: Convert to fraction form
    479,262.10/718,995.21 = 142,303.72/x
  3. Step 3: Cross multiply
    479,262.10x = 718,995.21 × 142,303.72
  4. Step 4: Simplify right side
    479,262.10x = 102,315,693,045.18
  5. Step 5: Solve for x
    x = 102,315,693,045.18/479,262.10
  6. Step 6: Final answer
    x = 213,485.88

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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.