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Finding the Fourth Proportional to 313,397.20, 469,404.60 and 188,520.40

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Solution

The fourth proportional to 313,397.20, 469,404.60 and 188,520.40 is: 282,364.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,397.20 : 469,404.60 = 188,520.40 : x
  2. Step 2: Convert to fraction form
    313,397.20/469,404.60 = 188,520.40/x
  3. Step 3: Cross multiply
    313,397.20x = 469,404.60 × 188,520.40
  4. Step 4: Simplify right side
    313,397.20x = 88,492,342,953.84
  5. Step 5: Solve for x
    x = 88,492,342,953.84/313,397.20
  6. Step 6: Final answer
    x = 282,364.82

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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.