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Finding the Fourth Proportional to 487,918.39, 673,740.71 and 306,688.69

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Solution

The fourth proportional to 487,918.39, 673,740.71 and 306,688.69 is: 423,490.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,918.39 : 673,740.71 = 306,688.69 : x
  2. Step 2: Convert to fraction form
    487,918.39/673,740.71 = 306,688.69/x
  3. Step 3: Cross multiply
    487,918.39x = 673,740.71 × 306,688.69
  4. Step 4: Simplify right side
    487,918.39x = 206,628,655,749.57
  5. Step 5: Solve for x
    x = 206,628,655,749.57/487,918.39
  6. Step 6: Final answer
    x = 423,490.20

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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.