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Finding the Fourth Proportional to 280,668.72, 387,318.30 and 153,341.58

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Solution

The fourth proportional to 280,668.72, 387,318.30 and 153,341.58 is: 211,608.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,668.72 : 387,318.30 = 153,341.58 : x
  2. Step 2: Convert to fraction form
    280,668.72/387,318.30 = 153,341.58/x
  3. Step 3: Cross multiply
    280,668.72x = 387,318.30 × 153,341.58
  4. Step 4: Simplify right side
    280,668.72x = 59,392,000,084.91
  5. Step 5: Solve for x
    x = 59,392,000,084.91/280,668.72
  6. Step 6: Final answer
    x = 211,608.90

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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.