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Finding the Fourth Proportional to 620,427.78, 930,645.63 and 339,791.94

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Solution

The fourth proportional to 620,427.78, 930,645.63 and 339,791.94 is: 509,690.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,427.78 : 930,645.63 = 339,791.94 : x
  2. Step 2: Convert to fraction form
    620,427.78/930,645.63 = 339,791.94/x
  3. Step 3: Cross multiply
    620,427.78x = 930,645.63 × 339,791.94
  4. Step 4: Simplify right side
    620,427.78x = 316,225,884,070.22
  5. Step 5: Solve for x
    x = 316,225,884,070.22/620,427.78
  6. Step 6: Final answer
    x = 509,690.08

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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.