Home / 261,604.10-391,628.55-172,957.70

Finding the Fourth Proportional to 261,604.10, 391,628.55 and 172,957.70

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Solution

The fourth proportional to 261,604.10, 391,628.55 and 172,957.70 is: 258,922.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,604.10 : 391,628.55 = 172,957.70 : x
  2. Step 2: Convert to fraction form
    261,604.10/391,628.55 = 172,957.70/x
  3. Step 3: Cross multiply
    261,604.10x = 391,628.55 × 172,957.70
  4. Step 4: Simplify right side
    261,604.10x = 67,735,173,262.34
  5. Step 5: Solve for x
    x = 67,735,173,262.34/261,604.10
  6. Step 6: Final answer
    x = 258,922.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.