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Finding the Fourth Proportional to 381,897.50, 526,583.75 and 243,890.51

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Solution

The fourth proportional to 381,897.50, 526,583.75 and 243,890.51 is: 336,291.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,897.50 : 526,583.75 = 243,890.51 : x
  2. Step 2: Convert to fraction form
    381,897.50/526,583.75 = 243,890.51/x
  3. Step 3: Cross multiply
    381,897.50x = 526,583.75 × 243,890.51
  4. Step 4: Simplify right side
    381,897.50x = 128,428,775,492.84
  5. Step 5: Solve for x
    x = 128,428,775,492.84/381,897.50
  6. Step 6: Final answer
    x = 336,291.22

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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.