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Finding the Fourth Proportional to 478,913.72, 718,344.66 and 146,489.72

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Solution

The fourth proportional to 478,913.72, 718,344.66 and 146,489.72 is: 219,726.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,913.72 : 718,344.66 = 146,489.72 : x
  2. Step 2: Convert to fraction form
    478,913.72/718,344.66 = 146,489.72/x
  3. Step 3: Cross multiply
    478,913.72x = 718,344.66 × 146,489.72
  4. Step 4: Simplify right side
    478,913.72x = 105,230,108,106.90
  5. Step 5: Solve for x
    x = 105,230,108,106.90/478,913.72
  6. Step 6: Final answer
    x = 219,726.65

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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.