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Finding the Fourth Proportional to 478,303.45, 660,105.39 and 357,234.64

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Solution

The fourth proportional to 478,303.45, 660,105.39 and 357,234.64 is: 493,018.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,303.45 : 660,105.39 = 357,234.64 : x
  2. Step 2: Convert to fraction form
    478,303.45/660,105.39 = 357,234.64/x
  3. Step 3: Cross multiply
    478,303.45x = 660,105.39 × 357,234.64
  4. Step 4: Simplify right side
    478,303.45x = 235,812,511,358.71
  5. Step 5: Solve for x
    x = 235,812,511,358.71/478,303.45
  6. Step 6: Final answer
    x = 493,018.63

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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.