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Finding the Fourth Proportional to 554,019.96, 764,501.61 and 312,361.95

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Solution

The fourth proportional to 554,019.96, 764,501.61 and 312,361.95 is: 431,033.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,019.96 : 764,501.61 = 312,361.95 : x
  2. Step 2: Convert to fraction form
    554,019.96/764,501.61 = 312,361.95/x
  3. Step 3: Cross multiply
    554,019.96x = 764,501.61 × 312,361.95
  4. Step 4: Simplify right side
    554,019.96x = 238,801,213,677.74
  5. Step 5: Solve for x
    x = 238,801,213,677.74/554,019.96
  6. Step 6: Final answer
    x = 431,033.59

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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.