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Finding the Fourth Proportional to 530,608.57, 732,318.39 and 312,857.18

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Solution

The fourth proportional to 530,608.57, 732,318.39 and 312,857.18 is: 431,789.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,608.57 : 732,318.39 = 312,857.18 : x
  2. Step 2: Convert to fraction form
    530,608.57/732,318.39 = 312,857.18/x
  3. Step 3: Cross multiply
    530,608.57x = 732,318.39 × 312,857.18
  4. Step 4: Simplify right side
    530,608.57x = 229,111,066,357.54
  5. Step 5: Solve for x
    x = 229,111,066,357.54/530,608.57
  6. Step 6: Final answer
    x = 431,789.23

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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.