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Finding the Fourth Proportional to 664,074, 916,307.72 and 373,645.28

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Solution

The fourth proportional to 664,074, 916,307.72 and 373,645.28 is: 515,566.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,074 : 916,307.72 = 373,645.28 : x
  2. Step 2: Convert to fraction form
    664,074/916,307.72 = 373,645.28/x
  3. Step 3: Cross multiply
    664,074x = 916,307.72 × 373,645.28
  4. Step 4: Simplify right side
    664,074x = 342,374,054,605.56
  5. Step 5: Solve for x
    x = 342,374,054,605.56/664,074
  6. Step 6: Final answer
    x = 515,566.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.