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Finding the Fourth Proportional to 313,555, 432,713.80 and 170,315

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Solution

The fourth proportional to 313,555, 432,713.80 and 170,315 is: 235,038.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,555 : 432,713.80 = 170,315 : x
  2. Step 2: Convert to fraction form
    313,555/432,713.80 = 170,315/x
  3. Step 3: Cross multiply
    313,555x = 432,713.80 × 170,315
  4. Step 4: Simplify right side
    313,555x = 73,697,650,847
  5. Step 5: Solve for x
    x = 73,697,650,847/313,555
  6. Step 6: Final answer
    x = 235,038.99

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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.