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Finding the Fourth Proportional to 493,799.51, 740,699.31 and 138,813.57

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Solution

The fourth proportional to 493,799.51, 740,699.31 and 138,813.57 is: 208,220.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,799.51 : 740,699.31 = 138,813.57 : x
  2. Step 2: Convert to fraction form
    493,799.51/740,699.31 = 138,813.57/x
  3. Step 3: Cross multiply
    493,799.51x = 740,699.31 × 138,813.57
  4. Step 4: Simplify right side
    493,799.51x = 102,819,111,814.14
  5. Step 5: Solve for x
    x = 102,819,111,814.14/493,799.51
  6. Step 6: Final answer
    x = 208,220.36

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Similar ratio
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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.