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Finding the Fourth Proportional to 313,278.80, 432,313.16 and 170,035.79

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Solution

The fourth proportional to 313,278.80, 432,313.16 and 170,035.79 is: 234,643.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,278.80 : 432,313.16 = 170,035.79 : x
  2. Step 2: Convert to fraction form
    313,278.80/432,313.16 = 170,035.79/x
  3. Step 3: Cross multiply
    313,278.80x = 432,313.16 × 170,035.79
  4. Step 4: Simplify right side
    313,278.80x = 73,508,706,676.25
  5. Step 5: Solve for x
    x = 73,508,706,676.25/313,278.80
  6. Step 6: Final answer
    x = 234,643.10

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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.