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Finding the Fourth Proportional to 280,639.66, 387,240.02 and 159,786.04

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Solution

The fourth proportional to 280,639.66, 387,240.02 and 159,786.04 is: 220,480.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,639.66 : 387,240.02 = 159,786.04 : x
  2. Step 2: Convert to fraction form
    280,639.66/387,240.02 = 159,786.04/x
  3. Step 3: Cross multiply
    280,639.66x = 387,240.02 × 159,786.04
  4. Step 4: Simplify right side
    280,639.66x = 61,875,549,325.32
  5. Step 5: Solve for x
    x = 61,875,549,325.32/280,639.66
  6. Step 6: Final answer
    x = 220,480.42

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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.