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Finding the Fourth Proportional to 355,113.60, 531,979.20 and 214,454.40

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Solution

The fourth proportional to 355,113.60, 531,979.20 and 214,454.40 is: 321,264.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,113.60 : 531,979.20 = 214,454.40 : x
  2. Step 2: Convert to fraction form
    355,113.60/531,979.20 = 214,454.40/x
  3. Step 3: Cross multiply
    355,113.60x = 531,979.20 × 214,454.40
  4. Step 4: Simplify right side
    355,113.60x = 114,085,280,148.48
  5. Step 5: Solve for x
    x = 114,085,280,148.48/355,113.60
  6. Step 6: Final answer
    x = 321,264.18

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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.