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Finding the Fourth Proportional to 261,005.70, 391,508.55 and 228,864.90

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Solution

The fourth proportional to 261,005.70, 391,508.55 and 228,864.90 is: 343,297.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,005.70 : 391,508.55 = 228,864.90 : x
  2. Step 2: Convert to fraction form
    261,005.70/391,508.55 = 228,864.90/x
  3. Step 3: Cross multiply
    261,005.70x = 391,508.55 × 228,864.90
  4. Step 4: Simplify right side
    261,005.70x = 89,602,565,144.90
  5. Step 5: Solve for x
    x = 89,602,565,144.90/261,005.70
  6. Step 6: Final answer
    x = 343,297.35

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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.