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Finding the Fourth Proportional to 487,987.82, 673,342.86 and 306,571.34

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Solution

The fourth proportional to 487,987.82, 673,342.86 and 306,571.34 is: 423,017.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,987.82 : 673,342.86 = 306,571.34 : x
  2. Step 2: Convert to fraction form
    487,987.82/673,342.86 = 306,571.34/x
  3. Step 3: Cross multiply
    487,987.82x = 673,342.86 × 306,571.34
  4. Step 4: Simplify right side
    487,987.82x = 206,427,622,869.63
  5. Step 5: Solve for x
    x = 206,427,622,869.63/487,987.82
  6. Step 6: Final answer
    x = 423,017.98

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1.5x scale

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.