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Finding the Fourth Proportional to 315,364.05, 472,994.91 and 90,673.29

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Solution

The fourth proportional to 315,364.05, 472,994.91 and 90,673.29 is: 135,995.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,364.05 : 472,994.91 = 90,673.29 : x
  2. Step 2: Convert to fraction form
    315,364.05/472,994.91 = 90,673.29/x
  3. Step 3: Cross multiply
    315,364.05x = 472,994.91 × 90,673.29
  4. Step 4: Simplify right side
    315,364.05x = 42,888,004,642.95
  5. Step 5: Solve for x
    x = 42,888,004,642.95/315,364.05
  6. Step 6: Final answer
    x = 135,995.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.