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Finding the Fourth Proportional to 478,913, 718,373.10 and 212,601.92

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Solution

The fourth proportional to 478,913, 718,373.10 and 212,601.92 is: 318,904.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,913 : 718,373.10 = 212,601.92 : x
  2. Step 2: Convert to fraction form
    478,913/718,373.10 = 212,601.92/x
  3. Step 3: Cross multiply
    478,913x = 718,373.10 × 212,601.92
  4. Step 4: Simplify right side
    478,913x = 152,727,500,336.35
  5. Step 5: Solve for x
    x = 152,727,500,336.35/478,913
  6. Step 6: Final answer
    x = 318,904.48

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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.