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Finding the Fourth Proportional to 391,036.44, 586,544.40 and 124,813.20

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Solution

The fourth proportional to 391,036.44, 586,544.40 and 124,813.20 is: 187,216.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,036.44 : 586,544.40 = 124,813.20 : x
  2. Step 2: Convert to fraction form
    391,036.44/586,544.40 = 124,813.20/x
  3. Step 3: Cross multiply
    391,036.44x = 586,544.40 × 124,813.20
  4. Step 4: Simplify right side
    391,036.44x = 73,208,483,506.08
  5. Step 5: Solve for x
    x = 73,208,483,506.08/391,036.44
  6. Step 6: Final answer
    x = 187,216.53

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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.