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Finding the Fourth Proportional to 480,649.15, 720,911.15 and 125,690.55

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Solution

The fourth proportional to 480,649.15, 720,911.15 and 125,690.55 is: 188,519.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,649.15 : 720,911.15 = 125,690.55 : x
  2. Step 2: Convert to fraction form
    480,649.15/720,911.15 = 125,690.55/x
  3. Step 3: Cross multiply
    480,649.15x = 720,911.15 × 125,690.55
  4. Step 4: Simplify right side
    480,649.15x = 90,611,718,944.63
  5. Step 5: Solve for x
    x = 90,611,718,944.63/480,649.15
  6. Step 6: Final answer
    x = 188,519.46

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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.