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Finding the Fourth Proportional to 478,211.05, 717,482.63 and 212,158.38

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Solution

The fourth proportional to 478,211.05, 717,482.63 and 212,158.38 is: 318,311.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,211.05 : 717,482.63 = 212,158.38 : x
  2. Step 2: Convert to fraction form
    478,211.05/717,482.63 = 212,158.38/x
  3. Step 3: Cross multiply
    478,211.05x = 717,482.63 × 212,158.38
  4. Step 4: Simplify right side
    478,211.05x = 152,219,951,398.15
  5. Step 5: Solve for x
    x = 152,219,951,398.15/478,211.05
  6. Step 6: Final answer
    x = 318,311.24

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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.