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Finding the Fourth Proportional to 478,690.96, 718,102.02 and 212,445.58

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Solution

The fourth proportional to 478,690.96, 718,102.02 and 212,445.58 is: 318,697.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,690.96 : 718,102.02 = 212,445.58 : x
  2. Step 2: Convert to fraction form
    478,690.96/718,102.02 = 212,445.58/x
  3. Step 3: Cross multiply
    478,690.96x = 718,102.02 × 212,445.58
  4. Step 4: Simplify right side
    478,690.96x = 152,557,600,138.07
  5. Step 5: Solve for x
    x = 152,557,600,138.07/478,690.96
  6. Step 6: Final answer
    x = 318,697.47

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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.