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Finding the Fourth Proportional to 280,671.72, 387,322.42 and 153,344.56

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Solution

The fourth proportional to 280,671.72, 387,322.42 and 153,344.56 is: 211,613.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,671.72 : 387,322.42 = 153,344.56 : x
  2. Step 2: Convert to fraction form
    280,671.72/387,322.42 = 153,344.56/x
  3. Step 3: Cross multiply
    280,671.72x = 387,322.42 × 153,344.56
  4. Step 4: Simplify right side
    280,671.72x = 59,393,786,073.04
  5. Step 5: Solve for x
    x = 59,393,786,073.04/280,671.72
  6. Step 6: Final answer
    x = 211,613.00

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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.