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Finding the Fourth Proportional to 478,808.20, 718,212.30 and 146,384.20

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Solution

The fourth proportional to 478,808.20, 718,212.30 and 146,384.20 is: 219,576.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,808.20 : 718,212.30 = 146,384.20 : x
  2. Step 2: Convert to fraction form
    478,808.20/718,212.30 = 146,384.20/x
  3. Step 3: Cross multiply
    478,808.20x = 718,212.30 × 146,384.20
  4. Step 4: Simplify right side
    478,808.20x = 105,134,932,965.66
  5. Step 5: Solve for x
    x = 105,134,932,965.66/478,808.20
  6. Step 6: Final answer
    x = 219,576.30

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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.