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Finding the Fourth Proportional to 340,289.39, 510,395.21 and 90,990.83

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Solution

The fourth proportional to 340,289.39, 510,395.21 and 90,990.83 is: 136,475.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,289.39 : 510,395.21 = 90,990.83 : x
  2. Step 2: Convert to fraction form
    340,289.39/510,395.21 = 90,990.83/x
  3. Step 3: Cross multiply
    340,289.39x = 510,395.21 × 90,990.83
  4. Step 4: Simplify right side
    340,289.39x = 46,441,283,785.92
  5. Step 5: Solve for x
    x = 46,441,283,785.92/340,289.39
  6. Step 6: Final answer
    x = 136,475.85

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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.