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Finding the Fourth Proportional to 478,303.20, 660,105.05 and 357,234.39

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Solution

The fourth proportional to 478,303.20, 660,105.05 and 357,234.39 is: 493,018.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,303.20 : 660,105.05 = 357,234.39 : x
  2. Step 2: Convert to fraction form
    478,303.20/660,105.05 = 357,234.39/x
  3. Step 3: Cross multiply
    478,303.20x = 660,105.05 × 357,234.39
  4. Step 4: Simplify right side
    478,303.20x = 235,812,223,086.50
  5. Step 5: Solve for x
    x = 235,812,223,086.50/478,303.20
  6. Step 6: Final answer
    x = 493,018.28

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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.