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Finding the Fourth Proportional to 642,646.95, 886,852.89 and 356,185.53

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Solution

The fourth proportional to 642,646.95, 886,852.89 and 356,185.53 is: 491,536.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,646.95 : 886,852.89 = 356,185.53 : x
  2. Step 2: Convert to fraction form
    642,646.95/886,852.89 = 356,185.53/x
  3. Step 3: Cross multiply
    642,646.95x = 886,852.89 × 356,185.53
  4. Step 4: Simplify right side
    642,646.95x = 315,884,166,656.68
  5. Step 5: Solve for x
    x = 315,884,166,656.68/642,646.95
  6. Step 6: Final answer
    x = 491,536.09

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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.