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Finding the Fourth Proportional to 553,637.67, 764,022.60 and 311,923.95

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Solution

The fourth proportional to 553,637.67, 764,022.60 and 311,923.95 is: 430,456.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,637.67 : 764,022.60 = 311,923.95 : x
  2. Step 2: Convert to fraction form
    553,637.67/764,022.60 = 311,923.95/x
  3. Step 3: Cross multiply
    553,637.67x = 764,022.60 × 311,923.95
  4. Step 4: Simplify right side
    553,637.67x = 238,316,947,281.27
  5. Step 5: Solve for x
    x = 238,316,947,281.27/553,637.67
  6. Step 6: Final answer
    x = 430,456.52

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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.