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Finding the Fourth Proportional to 340,286.47, 510,390.79 and 90,987.91

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Solution

The fourth proportional to 340,286.47, 510,390.79 and 90,987.91 is: 136,471.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,286.47 : 510,390.79 = 90,987.91 : x
  2. Step 2: Convert to fraction form
    340,286.47/510,390.79 = 90,987.91/x
  3. Step 3: Cross multiply
    340,286.47x = 510,390.79 × 90,987.91
  4. Step 4: Simplify right side
    340,286.47x = 46,439,392,187.67
  5. Step 5: Solve for x
    x = 46,439,392,187.67/340,286.47
  6. Step 6: Final answer
    x = 136,471.46

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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.