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Finding the Fourth Proportional to 384,628.77, 530,818.65 and 212,561.82

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Solution

The fourth proportional to 384,628.77, 530,818.65 and 212,561.82 is: 293,352.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,628.77 : 530,818.65 = 212,561.82 : x
  2. Step 2: Convert to fraction form
    384,628.77/530,818.65 = 212,561.82/x
  3. Step 3: Cross multiply
    384,628.77x = 530,818.65 × 212,561.82
  4. Step 4: Simplify right side
    384,628.77x = 112,831,778,333.94
  5. Step 5: Solve for x
    x = 112,831,778,333.94/384,628.77
  6. Step 6: Final answer
    x = 293,352.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.