Home / 208,866.24-288,385.14-128,401.64

Finding the Fourth Proportional to 208,866.24, 288,385.14 and 128,401.64

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Solution

The fourth proportional to 208,866.24, 288,385.14 and 128,401.64 is: 177,286.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,866.24 : 288,385.14 = 128,401.64 : x
  2. Step 2: Convert to fraction form
    208,866.24/288,385.14 = 128,401.64/x
  3. Step 3: Cross multiply
    208,866.24x = 288,385.14 × 128,401.64
  4. Step 4: Simplify right side
    208,866.24x = 37,029,124,927.63
  5. Step 5: Solve for x
    x = 37,029,124,927.63/208,866.24
  6. Step 6: Final answer
    x = 177,286.31

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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.