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Finding the Fourth Proportional to 478,678.93, 718,084.01 and 212,433.55

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Solution

The fourth proportional to 478,678.93, 718,084.01 and 212,433.55 is: 318,679.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,678.93 : 718,084.01 = 212,433.55 : x
  2. Step 2: Convert to fraction form
    478,678.93/718,084.01 = 212,433.55/x
  3. Step 3: Cross multiply
    478,678.93x = 718,084.01 × 212,433.55
  4. Step 4: Simplify right side
    478,678.93x = 152,545,135,442.54
  5. Step 5: Solve for x
    x = 152,545,135,442.54/478,678.93
  6. Step 6: Final answer
    x = 318,679.44

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1.5x scale

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.