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Finding the Fourth Proportional to 280,668.24, 387,348.48 and 153,362.70

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Solution

The fourth proportional to 280,668.24, 387,348.48 and 153,362.70 is: 211,654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,668.24 : 387,348.48 = 153,362.70 : x
  2. Step 2: Convert to fraction form
    280,668.24/387,348.48 = 153,362.70/x
  3. Step 3: Cross multiply
    280,668.24x = 387,348.48 × 153,362.70
  4. Step 4: Simplify right side
    280,668.24x = 59,404,808,733.70
  5. Step 5: Solve for x
    x = 59,404,808,733.70/280,668.24
  6. Step 6: Final answer
    x = 211,654.90

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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.