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Finding the Fourth Proportional to 384,467.96, 530,580.80 and 212,394.80

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Solution

The fourth proportional to 384,467.96, 530,580.80 and 212,394.80 is: 293,113.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,467.96 : 530,580.80 = 212,394.80 : x
  2. Step 2: Convert to fraction form
    384,467.96/530,580.80 = 212,394.80/x
  3. Step 3: Cross multiply
    384,467.96x = 530,580.80 × 212,394.80
  4. Step 4: Simplify right side
    384,467.96x = 112,692,602,899.84
  5. Step 5: Solve for x
    x = 112,692,602,899.84/384,467.96
  6. Step 6: Final answer
    x = 293,113.12

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1.5x scale

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.