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Finding the Fourth Proportional to 423,085.74, 634,620.41 and 103,239.69

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Solution

The fourth proportional to 423,085.74, 634,620.41 and 103,239.69 is: 154,857.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,085.74 : 634,620.41 = 103,239.69 : x
  2. Step 2: Convert to fraction form
    423,085.74/634,620.41 = 103,239.69/x
  3. Step 3: Cross multiply
    423,085.74x = 634,620.41 × 103,239.69
  4. Step 4: Simplify right side
    423,085.74x = 65,518,014,396.07
  5. Step 5: Solve for x
    x = 65,518,014,396.07/423,085.74
  6. Step 6: Final answer
    x = 154,857.53

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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.