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Finding the Fourth Proportional to 554,295.89, 764,925.19 and 312,580.49

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Solution

The fourth proportional to 554,295.89, 764,925.19 and 312,580.49 is: 431,359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,295.89 : 764,925.19 = 312,580.49 : x
  2. Step 2: Convert to fraction form
    554,295.89/764,925.19 = 312,580.49/x
  3. Step 3: Cross multiply
    554,295.89x = 764,925.19 × 312,580.49
  4. Step 4: Simplify right side
    554,295.89x = 239,100,686,097.47
  5. Step 5: Solve for x
    x = 239,100,686,097.47/554,295.89
  6. Step 6: Final answer
    x = 431,359.30

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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.