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Finding the Fourth Proportional to 280,649.03, 420,781.39 and 100,730.46

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Solution

The fourth proportional to 280,649.03, 420,781.39 and 100,730.46 is: 151,026.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,649.03 : 420,781.39 = 100,730.46 : x
  2. Step 2: Convert to fraction form
    280,649.03/420,781.39 = 100,730.46/x
  3. Step 3: Cross multiply
    280,649.03x = 420,781.39 × 100,730.46
  4. Step 4: Simplify right side
    280,649.03x = 42,385,502,974.14
  5. Step 5: Solve for x
    x = 42,385,502,974.14/280,649.03
  6. Step 6: Final answer
    x = 151,026.72

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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.