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Finding the Fourth Proportional to 313,685.40, 432,887.70 and 170,445.42

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Solution

The fourth proportional to 313,685.40, 432,887.70 and 170,445.42 is: 235,215.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,685.40 : 432,887.70 = 170,445.42 : x
  2. Step 2: Convert to fraction form
    313,685.40/432,887.70 = 170,445.42/x
  3. Step 3: Cross multiply
    313,685.40x = 432,887.70 × 170,445.42
  4. Step 4: Simplify right side
    313,685.40x = 73,783,725,839.33
  5. Step 5: Solve for x
    x = 73,783,725,839.33/313,685.40
  6. Step 6: Final answer
    x = 235,215.68

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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.