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Finding the Fourth Proportional to 280,373.07, 420,128.88 and 190,298.64

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Solution

The fourth proportional to 280,373.07, 420,128.88 and 190,298.64 is: 285,155.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,373.07 : 420,128.88 = 190,298.64 : x
  2. Step 2: Convert to fraction form
    280,373.07/420,128.88 = 190,298.64/x
  3. Step 3: Cross multiply
    280,373.07x = 420,128.88 × 190,298.64
  4. Step 4: Simplify right side
    280,373.07x = 79,949,954,488.72
  5. Step 5: Solve for x
    x = 79,949,954,488.72/280,373.07
  6. Step 6: Final answer
    x = 285,155.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.