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Finding the Fourth Proportional to 307,395.58, 424,208.36 and 171,438.30

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Solution

The fourth proportional to 307,395.58, 424,208.36 and 171,438.30 is: 236,586.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,395.58 : 424,208.36 = 171,438.30 : x
  2. Step 2: Convert to fraction form
    307,395.58/424,208.36 = 171,438.30/x
  3. Step 3: Cross multiply
    307,395.58x = 424,208.36 × 171,438.30
  4. Step 4: Simplify right side
    307,395.58x = 72,725,560,084.19
  5. Step 5: Solve for x
    x = 72,725,560,084.19/307,395.58
  6. Step 6: Final answer
    x = 236,586.23

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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.