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Finding the Fourth Proportional to 280,307.62, 386,703.16 and 171,416.71

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Solution

The fourth proportional to 280,307.62, 386,703.16 and 171,416.71 is: 236,480.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,307.62 : 386,703.16 = 171,416.71 : x
  2. Step 2: Convert to fraction form
    280,307.62/386,703.16 = 171,416.71/x
  3. Step 3: Cross multiply
    280,307.62x = 386,703.16 × 171,416.71
  4. Step 4: Simplify right side
    280,307.62x = 66,287,383,433.80
  5. Step 5: Solve for x
    x = 66,287,383,433.80/280,307.62
  6. Step 6: Final answer
    x = 236,480.85

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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.