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Finding the Fourth Proportional to 307,615.50, 424,509.39 and 173,479.50

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Solution

The fourth proportional to 307,615.50, 424,509.39 and 173,479.50 is: 239,401.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,615.50 : 424,509.39 = 173,479.50 : x
  2. Step 2: Convert to fraction form
    307,615.50/424,509.39 = 173,479.50/x
  3. Step 3: Cross multiply
    307,615.50x = 424,509.39 × 173,479.50
  4. Step 4: Simplify right side
    307,615.50x = 73,643,676,722.51
  5. Step 5: Solve for x
    x = 73,643,676,722.51/307,615.50
  6. Step 6: Final answer
    x = 239,401.71

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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.