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Finding the Fourth Proportional to 307,432.80, 424,289.88 and 180,215.28

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Solution

The fourth proportional to 307,432.80, 424,289.88 and 180,215.28 is: 248,716.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,432.80 : 424,289.88 = 180,215.28 : x
  2. Step 2: Convert to fraction form
    307,432.80/424,289.88 = 180,215.28/x
  3. Step 3: Cross multiply
    307,432.80x = 424,289.88 × 180,215.28
  4. Step 4: Simplify right side
    307,432.80x = 76,463,519,525.37
  5. Step 5: Solve for x
    x = 76,463,519,525.37/307,432.80
  6. Step 6: Final answer
    x = 248,716.21

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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.