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Finding the Fourth Proportional to 384,551.34, 530,691.55 and 212,480.40

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Solution

The fourth proportional to 384,551.34, 530,691.55 and 212,480.40 is: 293,228.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,551.34 : 530,691.55 = 212,480.40 : x
  2. Step 2: Convert to fraction form
    384,551.34/530,691.55 = 212,480.40/x
  3. Step 3: Cross multiply
    384,551.34x = 530,691.55 × 212,480.40
  4. Step 4: Simplify right side
    384,551.34x = 112,761,552,820.62
  5. Step 5: Solve for x
    x = 112,761,552,820.62/384,551.34
  6. Step 6: Final answer
    x = 293,228.86

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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.