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Finding the Fourth Proportional to 478,911, 718,370.10 and 212,599.92

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Solution

The fourth proportional to 478,911, 718,370.10 and 212,599.92 is: 318,901.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,911 : 718,370.10 = 212,599.92 : x
  2. Step 2: Convert to fraction form
    478,911/718,370.10 = 212,599.92/x
  3. Step 3: Cross multiply
    478,911x = 718,370.10 × 212,599.92
  4. Step 4: Simplify right side
    478,911x = 152,725,425,790.39
  5. Step 5: Solve for x
    x = 152,725,425,790.39/478,911
  6. Step 6: Final answer
    x = 318,901.48

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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.