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Finding the Fourth Proportional to 553,804.80, 764,266.64 and 312,074.07

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Solution

The fourth proportional to 553,804.80, 764,266.64 and 312,074.07 is: 430,671.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,804.80 : 764,266.64 = 312,074.07 : x
  2. Step 2: Convert to fraction form
    553,804.80/764,266.64 = 312,074.07/x
  3. Step 3: Cross multiply
    553,804.80x = 764,266.64 × 312,074.07
  4. Step 4: Simplify right side
    553,804.80x = 238,507,799,349.65
  5. Step 5: Solve for x
    x = 238,507,799,349.65/553,804.80
  6. Step 6: Final answer
    x = 430,671.24

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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.