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Finding the Fourth Proportional to 215,705.40, 323,622.90 and 153,497.40

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Solution

The fourth proportional to 215,705.40, 323,622.90 and 153,497.40 is: 230,292.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,705.40 : 323,622.90 = 153,497.40 : x
  2. Step 2: Convert to fraction form
    215,705.40/323,622.90 = 153,497.40/x
  3. Step 3: Cross multiply
    215,705.40x = 323,622.90 × 153,497.40
  4. Step 4: Simplify right side
    215,705.40x = 49,675,273,730.46
  5. Step 5: Solve for x
    x = 49,675,273,730.46/215,705.40
  6. Step 6: Final answer
    x = 230,292.21

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1.5x scale

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.