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Finding the Fourth Proportional to 478,785.60, 718,008.30 and 212,068.80

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Solution

The fourth proportional to 478,785.60, 718,008.30 and 212,068.80 is: 318,027.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,785.60 : 718,008.30 = 212,068.80 : x
  2. Step 2: Convert to fraction form
    478,785.60/718,008.30 = 212,068.80/x
  3. Step 3: Cross multiply
    478,785.60x = 718,008.30 × 212,068.80
  4. Step 4: Simplify right side
    478,785.60x = 152,267,158,571.04
  5. Step 5: Solve for x
    x = 152,267,158,571.04/478,785.60
  6. Step 6: Final answer
    x = 318,027.86

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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.